Multidimensional array data entry

WIth Flex3 Beta3 installed and learning Flex&Actionscript
require help/guidance to solve the problem described below. Problem
clarified below.
Display a multi-dimensional array, 10 x 10 where each cell
will contain just one alphanumeric character.
Picture a crossword puzzle. Each cell is only one character
wide.
Allow the user to enter a character in any cells of the
array.
How do I display this arraycollection without having to
define each and every cell of the datagrid?
I know this can be done with a lot of coding but I want to be
able to use an array and the indexes to the array and via loops
minimize the code that has to be written.
I have been trying to do this in Flex3 but have not been able
to make much progress. Should I use ActionScript3 for this instead
of Flex3? If so, some tips will be most welcome.
Your help and guidance will be appreciated.
Thanks.

There are many ways to do this.
Just one possible way is:
for your accept button, have it call an actionscript function
to
loop through the arraycollection, and set the enabled
property of whatever components you are using to enter your one
character to false if there is a value.
private function approveSelection():void
for (var x:int =0; x < yourarray.length; x++)
if (yourarray[x].yourvalue != "")
correspondingComponent.enabled = false;
HTH,
-p

Similar Messages

Data entry type in array of clusters

Hi i have 4 column array of cluster
X Y Z & Data entry Type
X+Y=Z simply
I wanna do this
when i entry x; data type cell will auto X (not numerical value just "X")
when i entry z; data type cell will auto Z
Then i can build my algorithm.
How can i do this.
Thanks.
Solved!
Go to Solution.

As i said, you image displays a STRING table.
If you want something like Excel with predefined datatypes for columns, an array of cluster can work out.
But building an algorithm which checks for specific dependencies within a single record/row
a) is very specific
b) can get quite complex.
That being said, you have to start by looking at these dependencies and evaluate if rows can swap/be in arbitrary order.
Simply stating:
row 0 => column 0 is of interest
row 1 => column 1 is of interest
row 2 => column 2 is of interest
will most likely not work.
Norbert
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Data entry in array of clusters

Hi guys. I have 2 array of clusters in tab. My cluster have different types elements. I need get referance data entry.
I can do it for one array of cluster with dynamic event structure but cant do it for other.
My vi in attachment.
Can anyone help me for solution?
Thanks.
Kerem
Solved!
Go to Solution.
Attachments:
x1.vi ‏21 KB

Why can't you just duplicate the same for the Array 2? I am not sure what is the actual problem you are facing but duplication did work.
The best solution is the one you find it by yourself
Attachments:
x1_Anand.vi ‏29 KB

Bindind data to multidimensional Array

I have a multidimensional Array (3D). I have some fields which I want to bind to some TextInputs:
model.creditosConsumoModel.literaturaCredito[i][j][k]
And here's a example of the data binding:
text="{(model.creditosConsumoModel.literaturaCredito[4][12][0] as Apartado).texto}"
The problem is: When I do a: model.creditosConsumoModel.literaturaCredito = new Array and I define the Array again with new data everything gets blank (all the text Inputs) and I loss the information.
Resume: It only works the first time, but not the rest of the times.
Thanks and regards!!!

@Pauland
That's what I was thinking as it was an array of arrays.
@quebequiano
Generally, for something like this, I make a wrapper object and set the values on that so I don't have to deal with issues like this. I'm not sure how architecturally sound it is, but it sounds like you are trying to take small pieces of data and prepare them for your view, in which case a wrapper/adapter would provide you with the benefits of databinding.
P.S Does your name mean "Quebecian" in spanish ?

Is there a date entry widget for XMP custom file info panels?

Looking through the Custom File Info Panels documentation, the samples, and the default info panels presented in Photoshop, I can't find any reference to a date entry widget - the closest I've seen is the date_static_text widget.
Is there any way to present an editable, validating date entry field to our end-users through the File Info panel?
(the info we're wanting to store is a release date so it's user-specified, and not derivable from the file in any way)

Mark,
The PDF/A extension schema provides a big step to the self-sufficient functionality that you are asking about. It permits the XMP schema description information of custom XMP schemas to be embedded into the XMP as payload so that the file can be opened in years to come and the target metadata acurately interperted. Currently, PDF tools are active candidate to make use of this facility. However, there is nothing preventing future use with other file formats, and other tools (via plug-ins?).
It does not include vocabulary, static text, and panel presentation layout information.
http://www.pdfa.org/doku.php
It defines a "known" subset of standard XMP properties from the 2001 XMP Spec. Everything else is "custom".
You could craft a custom File Info "template" with the PDF/A extension for your custom XMP fields. Then import the template into each file.
The PDF/A extension schema itself is implemented with multi-dimensional XMP arrays. MetaGrove Plug-in dialog screen shots can be viewed on http://www.poundhillsoftware.net/Acrobat.htm
Regards,
Carl Rambert

Call library function node with array of clusters using array data pointer

Hello all.
I am writing a LabVIEW wrapper for an existing DLL function.
The function has, as one of its parameters, an array of structs. The struct is very simple, containing two integers. I am using the call library function node to access it.
In Labview I created an array of clusters, where the cluster has two 32-bit integers as its members. So far, so good.
Now I have to pass this in to the Call Library Function Node. Here I am running into trouble.
I have used The topic in LAVA and The topic in the knowledge base as my primary sources of information, though I have read a bunch of forum topics on the subject too.
I do understand that I could write a new function which takes as a parameter a struct with the size as the first member and an array as the second, and I might just do this and have it call the regular function, but I was hoping to do it more simply.
According to the C file which LabVIEW generates for me from the CLFN when I choose "Adapt to Type" and "Array Data Pointer", the prototype it is expecting is:
int32_t myFunc(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
And the prototype of the function in my DLL is
int borland_dll myFunc(DWORD handle, usint channel,
int FIFOnumber, struct mStruct *data, int numWords, int *actualLoaded, int *actualStartIndex);
This looks like a match to me, but it doesn't work (I get garbage in data). From the topic in LAVA referenced above, I understood that it would work. It does not.
If I cast data to the pointer-to-pointer I get when I generate c code by wiring my struct to a CIN and generating, then I seem to get what I expect. But this seems to work when I choose "pointers to handles" too, and I would expect array data pointer to give a different result.
Is there any way to get this to work directly, or will I have to create a wrapper? (I am currently using LabVIEW 2011, but we have customers using 2009 and 2012, if not other versions as well).
Thank you.
Batya
Solved!
Go to Solution.

OK, here is more detailed information.
I have attached the VI.
This is the code from the "C" file created by right-clicking the CLN and creating a "C" file.
When the parameter in the CLN is set to "array data pointer":
/* Call Library source file */
#include "extcode.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, void data[], int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
When the parameter is "pointers to handles":
/* Call Library source file */
#include "extcode.h"
/* lv_prolog.h and lv_epilog.h set up the correct alignment for LabVIEW data. */
#include "lv_prolog.h"
/* Typedefs */
typedef struct {
int32_t control;
int32_t data;
} TD2;
typedef struct {
int32_t dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
#include "lv_epilog.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
When the parameter is set to "handles by value":
/* Call Library source file */
#include "extcode.h"
/* lv_prolog.h and lv_epilog.h set up the correct alignment for LabVIEW data. */
#include "lv_prolog.h"
/* Typedefs */
typedef struct {
int32_t control;
int32_t data;
} TD2;
typedef struct {
int32_t dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
#include "lv_epilog.h"
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex);
int32_t Load_Transmit_FIFO_RTx(uint32_t handle, uint16_t channel,
int32_t FIFOnumber, TD1Hdl *data, int32_t numWords, int32_t *actualLoaded,
int32_t *actualStartIndex)
/* Insert code here */
As to the DLL function, it is a bit more complicated than I explained above, in the current case. My VI calls the function by this name in one DLL, and that DLL loads a DLL and calls a function (with the same name) in the second DLL, which does the work. (Thanks Rolfk, for helping me with that one some time back!)
Here is the code in the first ("dispatcher") DLL:
int borland_dll Load_Transmit_FIFO_RTx(DWORD handle, usint channel, int FIFOnumber, struct FIFO_DATA_CONTROL *data, int numWords, int *actualLoaded, int *actualStartIndex)
t_DispatchTable *pDispatchTable = (t_DispatchTable *) handle;
int retStat = 0;
retStat = mCheckDispatchTable(pDispatchTable);
if (retStat < 0)
return retStat;
if (pDispatchTable->pLoad_Transmit_FIFO_RTx == NULL)
return edispatchercantfindfunction;
return pDispatchTable->pLoad_Transmit_FIFO_RTx(pDispatchTable->handlertx, channel, FIFOnumber, data, numWords, actualLoaded, actualStartIndex);
borland_dll is just "__declspec(dllexport)"
The current code in the DLL that does the work is:
// TEMP
typedef struct {
int control;
int data;
} TD2;
typedef struct {
int dimSize;
TD2 data[1];
} TD1;
typedef TD1 **TD1Hdl;
// END TEMP
int borland_dll Load_Transmit_FIFO_RTx(int handlertx, usint channel, int FIFOnumber, struct FIFO_DATA_CONTROL *data, int numWords, int *actualLoaded, int *actualStartIndex){
struct TRANSMIT_FIFO *ptxFIFO; //pointer to transmit FIFO structure
usint *pFIFOlist; //pointer to array of FIFO pointers to FIFO structures
int FIFOentry, numLoaded;
usint *lclData;
usint nextEntryToTransmit;
// TEMP
FILE *pFile;
int i;
TD1** ppTD = (TD1**) data;
TD1 *pTD = *ppTD;
pFile = fopen("LoadFIFOLog.txt", "w");
fprintf(pFile, "Starting Load FIFO with %d data words, data pointer 0x%x, with the following data&colon; \n", numWords, data);
for (i = 0; i < numWords; i++) {
fprintf(pFile, "%d: control--0x%x, data--0x%x \n", i, data[i].control, data[i].data);
fflush(pFile);
fprintf(pFile, "OK, using CIN generated structures: dimSize %d, with the following data&colon; \n", pTD->dimSize);
for (i = 0; i < numWords; i++) {
fprintf(pFile, "%d: control--0x%x, data--0x%x \n", i, pTD->data[i].control, pTD->data[i].data);
fflush(pFile);
// END TEMP
if ((handlertx) <0 || (handlertx >= NUMCARDS)) return ebadhandle;
if (cardrtx[handlertx].allocated != 1) return ebadhandle;
pFIFOlist = (usint *) (cardrtx[handlertx].segaddr + cardrtx[handlertx].glob->dpchn[channel].tr_stk_ptr);
pFIFOlist += FIFOnumber;
ptxFIFO = (struct TRANSMIT_FIFO *)(cardrtx[handlertx].segaddr + *pFIFOlist);
//use local copy of ptxFIFO->nextEntryToTransmit to simplify algorithm
nextEntryToTransmit = ptxFIFO->nextEntryToTransmit;
//on entering this routine nextEntryToLoad is set to the entry following the last entry loaded
//this is what we need to load now unless it's at the end of the FIFO in which case we need to wrap around
if ( ptxFIFO->nextEntryToLoad >= ptxFIFO->numEntries)
*actualStartIndex = 0;
else
*actualStartIndex = ptxFIFO->nextEntryToLoad;
//if nextEntryToLoad points to the last entry in the FIFO and nextEntryToTransmit points to the first, the FIFO is full
//also if nextEntryToLoad == nextEntryToTransmit the FIFO is full and we exit without loading anything
if (( (( ptxFIFO->nextEntryToLoad >= ptxFIFO->numEntries) && (nextEntryToTransmit == 0)) ||
( ptxFIFO->nextEntryToLoad == nextEntryToTransmit)) && (ptxFIFO->nextEntryToLoad != INITIAL_ENTRY)){
*actualLoaded = 0; //FIFO is full already, we can't add anything
return 0; //this is not a failure, we just have nothing to do, this is indicated in actualLoaded
numLoaded = 0;
lclData = (usint *)data; //must use 16 bit writes to the module
//conditions are dealt with inside the for loop rather than in the for statement itself
for (FIFOentry = *actualStartIndex; ; FIFOentry++) {
//if we reached the end of the FIFO
//if the module is about to transmit the first element of the FIFO, the FIFO is full and we're done
//OR if the module is about to transmit the element we're about to fill in, we're done - the
//exception is if this is the first element we're filling in which means the FIFO is empty
if ((( FIFOentry >= ptxFIFO->numEntries) && (nextEntryToTransmit == 0)) ||
((FIFOentry == nextEntryToTransmit) && (FIFOentry != *actualStartIndex) )){
*actualLoaded = numLoaded;
//set nextEntryToLoad to the end of the FIFO, we'll set it to the beginning next time
//this allows us to distinguish between full and empty: nextEntryToLoad == nextEntryToTransmit means empty
ptxFIFO->nextEntryToLoad = FIFOentry;
return 0;
//we reached the end but can continue loading from the top of the FIFO
if ( FIFOentry >= ptxFIFO->numEntries)
FIFOentry = 0;
//load the control word
ptxFIFO->FifoData[FIFOentry * 3] = *lclData++;
//skip the high of the control word, the module only has a 16 bit field for control
lclData++;
//now put in the data
ptxFIFO->FifoData[(FIFOentry * 3) + 2] = *lclData++;
ptxFIFO->FifoData[(FIFOentry * 3) + 1] = *lclData++;
numLoaded++;
//we're done because we loaded everything the user asked for
if (numLoaded >= numWords) {
*actualLoaded = numLoaded;
ptxFIFO->nextEntryToLoad = FIFOentry+1;
return 0;
//if we reached here, we're done because the FIFO is full
*actualLoaded = numLoaded;
ptxFIFO->nextEntryToLoad = FIFOentry;
fclose (pFile);
return 0;
As you can see, I added a temporary diagnostic with the structures that were created in the "Handles by value" case, and print out the data. I see what is expected, whichever of the options I pick in the CLN!
I understood (from the information in the two links I mentioned in my original post, and from the name of the option itself) that "array data pointer" should pass the array of data itself, without the dimSize field. But that does not seem to be what is happening.
Batya
Attachments:
ExcM4k Load Transmit FIFO.vi ‏15 KB

Mixed Data Type Table Control for Data Entry

Hi Guys --
I'm attempting to do error-checked data entry,
My data is mixed: path, boolean, and numeric. The natural organization is an array of clusters. For instance, the cluster element would look like "path, boolean, numeric, numeric" and I would have many rows of this data cluster. To further complicate things I have to dynamically define the number of numeric elements in the cluster (tricky already) and also dynamically define the length of the array.
I find the table control to be ideal to handle the dynamic nature of the data for editing. I can easily use scroll bars to navigate to the appropriate part of the data. I can delete rows and columns etc.
On the other hand, the table can only handle string data. I find that doing data checking and type conversion on the table elements to be extremely cumbersome.
I think what I'm looking for is a Table Control with ability to handle controls as elements. From what I've read in this list and personally experienced, that functionality doesn't exist.
Does LV have in-built functionality that I'm overlooking to resolve this problem? Is there a third-party library that would do the job?
Thanks,
John

Hi Ben --
I think perhaps that I wasn't clear in my description.
As I pointed out, my data is organized naturally as an Array of Clusters. More descriptively, my data looks like spreadsheet data; some text, some numbers. I need to add rows and columns dynamically. I need to be able to resize column widths dynamically... and while the program is executing.
The Table Control does all of this. The intuitive way that the Table Control permits a user to enter data is also good for my user. The Array of Cluster data looks like spreadsheet data and a Table looks close enough to a spreadsheet. A Table permits one to insert and delete rows, resize columns widths, and scroll around.
I don't see that I get these features with an Array of Clusters Control.
The issue with the Table Control is the lack of in-built data types, so I spend an inordinate amount of time doing type-conversion and range-checking.
At this point I'm pretty much convinced that LV doesn't have the in-built capability that I'm looking for.
I am curious if there are any LV libraries or Active-X controls somewhere that would implement the functionality that I require?

MultiDimensional Array or what????

Hi Guys
I have created an xml document that has this structure for
each child:
<work>
<client>Telstar Records</client>
<titled>Stargate Music.co.uk</titled>
<thumb>images/thumbs/stargate_sm.jpg</thumb>
<description>They were an up and coming band, i was a
designer with a passion for 3d, they met fell in love and a new
site was born. All it took was four press shots, one promo and a
lot of imagination</description>
<images>
<image>images/large/telstar_sg_01.jpg</image>
<image>images/large/telstar_sg_02.jpg</image>
<image>images/large/telstar_sg_03.jpg</image>
</images>
<link>
http://www.4zero1.co.uk/backupsites/stargate/index.html</link>
</work>
I have succesfully created buttons and used an associative
array to compile the info for each button, woooooo aren't i
clever!!!! I have set up a path to the <images> node, but I
am stumped as to how i can pull the information from the
'workImages' variable in my getworkData() function below .
I need your help, as i would like to create buttons of the
childnodes named <image> in the xml, above you can see that
if i was successful i would have three buttons. My problem is
relating the information to the buttons and making the buttons
appear. I am not using a for loop as i would like to animate each
button using a scripted tween. as in the makeButtons() function.
Do I need to create a multidimensional array? I have included
my code below, please don't get too lost in it, i hope someone can
fathom it for me and give me an answer. My associative array is in
the function getworkData(); My function to create the 'image'
buttons is called portfolioImageCreator();
Many thanks
Jim

You could use a table of records or a record group. They both achieve similar results but with very different syntax. I am not sure if there is any difference in performance.
Record groups are good for certain things like lists populated from the database because built-ins are provided for manipulating them. If you are going to do the manipulation programatically, I personally find the syntax for tables of records less cumbersome than record groups. Learning the syntax for tables of records is also likely to be more universally useful to you as they have various uses such as passing data between procedures.
In your situation the table of records needs to exist throughout the forms session rather than just during the execution of a single pl/sql block. The way to do that is create a program unit which is a package header without a body. Declare the table in there and it can be used throughout the form.
However, if you only ever want to keep 5 records, it would probably be easier just to have 5 ordinary items in a control block on the null canvas (or global variables). When you want to record your new action just do:
:item5 := :item4;
:item4 := :item3;
:item3 := :item2;
:item2 := :item1;
:item1 := :new_stuff;
You could even construct the above in a loop using
copy(name_in('item'||i),'item'i+i)
but with only 5 items to manipulate, is it worth the bother ?
Whatever method you decide to use, you are not going to get anything simpler than 5 little assignment statements.

Multidimensional array and chars

Hi again,
My apologies in advance if i can't word my question that well, i will try and be as clear and succinct as possible and hopefully for this newbie you can apprehend what i'm trying to figure out if i come up short.
I'm trying to write a rather large control statement with a while loop and several nested ifs inside it that ultimately returns a single character after all is said and done, and then continually concatenates that character to a string which will eventually be output to a file. The part i'm stuck at is after i've changed the two letter characters into their ASCII values. I need to make the program take those two ASCII values and use them as a reference to a character in a multidimensional array of alphabetic characters, and then that character will be what is returned at the end.
Here's the method, thanks in advance for your time.
public String encode( String cipherKey )
        String textToEncode = input.next();
        String encodedText = " ";
        cipherKey = cipherKey.toUpperCase();
        textToEncode = textToEncode.toUpperCase();
        openFiles();
        int numberOfChars = textToEncode.length();
        int cipherPos = 0;
        int cipherLength = cipherKey.length();
        while (input.hasNext())
            for ( int count = 0; count < numberOfChars; count++ )
                if (Character.isLetter(textToEncode.charAt(count)))
                    cipherPos %= cipherLength;
                    int xChar = (int) textToEncode.charAt(cipherPos);
                    int yChar = (int) textToEncode.charAt(count);
                    xChar -= 65;
                    yChar -= 65;
                    if ((xChar >= 0) && (xChar <= 25))
                        if ((yChar >= 0) && (yChar <= 25))
                    return ' ';
                 encodedText = encodedText +
    return encodedText;
    }As you can see towards the end there are some incomplete statements where i became lost.

its there, i couldnt c&p the whole program because it went over my character limit. Yeah it did compile but couldn't invoke my encode method without a NullPointerException.
Here are the other methods in the class....
    public String setSource( String in )
        source = in;
        return source;
     Sets the value of the output file
     * @param out A <code>String</code> value representng name of output file.
     * @see #setSource
    public String setDestination( String out )
        destination = out;
        return destination;
     * Method to open both input and output files, and to test for exceptions
     * @see #encode
     * @see #decode
    private void openFiles()
    File inputFile = new File(source); //Creates new file object from source file
    File outputFile = new File(destination); //Creates new file object from destination file
        /* Tests whether input file exists and if so enables the Scanner
         * to read the data in from the source file. Catches SecurityException and
         * FileNotFoundException amd prints appropriate messages to user.
        if (inputFile.exists())
            try
                input = new Scanner( new File( source ) );
                FileReader reader = new FileReader(inputFile);
                BufferedReader BufferIn = new BufferedReader(reader);
            catch ( SecurityException securityException )
                System.err.println("You do not have read access to this file.");
                System.exit( 1 );
            catch ( FileNotFoundException filesNotFoundException )
                System.err.println("Error: File does not exist.");
                System.exit( 1 );
        /* Tests whether output file exists and if it does enables Formatter
         * to write encoded output to file. Catches SecurityException and
         * FileNotFoundException and prints appropriate message to user.
        if (outputFile.exists())
            try
                output = new Formatter( new File( destination ) );
            catch ( SecurityException securityException )
                System.err.println("You do not have write access to this file.");
                System.exit( 1 );
            catch ( FileNotFoundException filesNotFoundException )
                System.err.println("Error: File does not exist.");
                System.exit( 1 );
     * Closes both input and output files after output file has been written
     * to.
     * @see #openFiles
    private void closeFiles()
        if ( output != null )
            input.close();
            output.close();
    }Edited by: fearofsoftware on Apr 17, 2009 8:35 PM

JNI multidimensional Array and OpenCV

Hello everybody,
my first post, so lets go..
At the moment I am writing my thesis in the filed of automatic image classification. The project is written in Java, but I wanna use the OpenCV library from Intel (http://sourceforge.net/projects/opencvlibrary/) for facedetection.
So far I managed to call the native method from Java. What I do I parse the path of the image to be analyzed as a string to my C++ programm. The faces are being detected and written into a so called CvSeq (http://www.comp.leeds.ac.uk/vision/opencv/opencvref_cxcore.htm#cxcore_ds_sequences) which holds the coordinates of the rectangles surrounding the found faces. Until now I can only call cvSeq->total which gives me the total number of faces as ints. That integer I return to my java api.
What I don't know is, how to return a multidimensional array (2 dimensions) where the first dim contains the path as a string to the file and the second dimension 3 integers for x,y coordinates and the lenght of each rectangle.
Or better, I might know how to return that Array, but not how to create it.
I know this is somewht OpenCV specific, but maybe someone knows anything. Any little help would be greatly appreciated. Thanks a lot!!!!
Regards
Carsten
attached: JNI source code
/////////////////////////////////////////// source code ///////////////////////////////////////////////
#include "cv.h"
#include "highgui.h"
#include "cxcore.h"
#include "cxtypes.h"
#include "cvaux.h"
#include "org_kimm_media_image_data_JNIOpenCV.h"
#include <stdio.h>
JNIEXPORT jint JNICALL
Java_org_kimm_media_image_data_JNIOpenCV_getFaces(JNIEnv *env, jobject object, jstring path)
//declarations
CvHaarClassifierCascade *pCascade = 0;
CvMemStorage *pStorage = 0;
CvSeq *pFaceRectSeq;
int scale=1;
jobjectArray recPoints;
const char *str = env->GetStringUTFChars(path, 0);
//initializations
IplImage* pInpImg = cvLoadImage(str, CV_LOAD_IMAGE_COLOR);
IplImage* small_image = pInpImg;
pStorage = cvCreateMemStorage(0);
pCascade = (CvHaarClassifierCascade *)cvLoad
     (("C:/OpenCV/data/haarcascades/haarcascade_frontalface_default.xml"),0, 0, 0 );
//validaste that everything initilized properly
if( !pInpImg || !pStorage || !pCascade)
     printf("Initialization failed: %s \n",
          (!pInpImg) ? "didn't load image file" :
          (!pCascade) ? "didn't load Haar Cascade --"
               "make sure Path is correct" :
          "failed to allocate memory for data storage");
     exit(-1);
//performance boost through reducing image size by factor 2
          small_image = cvCreateImage( cvSize(pInpImg->width/2,pInpImg->height/2), IPL_DEPTH_8U, 3 );
cvPyrDown( pInpImg, small_image, CV_GAUSSIAN_5x5 );
scale = 2;
//detect faces in image
pFaceRectSeq = cvHaarDetectObjects(small_image, pCascade, pStorage,
                                        1.1,                                        //increase search scale by 10% each pass
                                        6,                                        //drop group of fewer than three detections
                                        CV_HAAR_DO_CANNY_PRUNING,          //skip regions unlikely to contain faces
                                             cvSize(50,50));                         //use XML default for smallest search scale
//initialize array for location of the faces (HERE IS WHERE I GET INTO TROUBLE!!!!!)
int x = pFaceRectSeq->total;
jclass intArrCls = env->FindClass ( "[I" ) ;
recPoints = env->NewObjectArray ( x, intArrCls, NULL ) ;
//for(int j = 0; j <= x; j++) {
//   recPoints[j] = (jintArray)env->NewIntArray(3);
for(int i=0;i<(pFaceRectSeq ? pFaceRectSeq->total:0); i++)
                                   CvRect* r = (CvRect*)cvGetSeqElem(pFaceRectSeq, i);
                                   CvPoint pt1 = {(r->x)*scale, (r->y)*scale};
                                   CvPoint pt2 = {(r->x + r->width)*scale, (r->y + r->height)*scale};
//env->SetObjectArrayElement(recPoints,i, pt1.x);
return pFaceRectSeq->total;
}

Any Java array you can consider like one-dimensional array of arrays n-1 dimension. For example, you have a 3 dim. array of objects:
Object[][][] arr = new Object[1][2][6]; It can be considered as a set of one-dimensional arrays:
==========================================
| dim   |           Type
==========================================
0          1 element, an array of type �[[Ljava/lang/Object;�
1          1 x 2 elements , an arrays of type �[Ljava/lang/Object;�
So you can convert three-dimensional array to one-dimensional array like in C++:
|�[Ljava/lang/Object;� | �[Ljava/lang/Object;� | �[Ljava/lang/Object;�
     6 objects                 6 objects                 6 objects

Memory Consumption in Multidimensional Arrays

Hi,
I've noticed that the memory consumption of multidimensional arrays in Java is sometimes far above one could expect for the amount of data that is being stored. For example, here is a simple program which stores a table containing only integers and reports the memory consumption after it is filled:
public static void main(String[] args) {
int tableSize = 1000000;
int noFields = 10;
Random rnd3 = new Random();
int arr[][] = new int[tableSize][noFields];
for (int i = 0; i < tableSize; i++) {
for (int j = 0; j < noFields; j++) {
     arr[i][j] = rnd3.nextInt(100);
Runtime.getRuntime().gc();
Runtime.getRuntime().gc();
Runtime.getRuntime().gc();
// Ensures table's data is still referenced
System.out.println(arr[rnd3.nextInt(arr.length)]);
long totalMemory = Runtime.getRuntime().totalMemory();
long usedMemory = totalMemory-Runtime.getRuntime().freeMemory();
System.out.println("Total Memory: " + totalMemory/(1024.0*1024) + " MB.");
System.out.println("Used Memory: " + usedMemory/(1024.0*1024) + " MB.");
Output:
Total Memory: 866.1875 MB.
Used Memory: 62.124053955078125 MB.
In this case the memory consumption was around 20MB above the expected 38MB required for storing 10M integers. The interesting thing is that the memory consumption varies when the numbers of rows and columns are changed, even though the total amount of items is kept fixed (see below):
Rows:100; Cols:100000 -> Used Memory: 43,05 MB
Rows:1000; Cols:10000 -> Used Memory: 43,07 MB
Rows:10000; Cols:1000 -> Used Memory: 43,24 MB
Rows:100000; Cols:100 -> Used Memory: 44,96 MB
Rows:1000000; Cols:10 -> Used Memory: 62,15 MB
Rows:10000000; Cols:1 -> Used Memory: 192,15 MB
Any ideas about the reasons for that behavior?
Thanks,
Marcelo

mrnm wrote:
In this case the memory consumption was around 20MB above the expected 38MB required for storing 10M integers.That's only the expected value if you assume that a 2D array of ints is nothing more than a bunch of ints lined up end to end. This is not the case. A "2D" array in java is really just a plain ol' array whose component type is "reference to array".
The interesting thing is that the memory consumption varies when the numbers of rows and columns are changed, even though the total amount of items is kept fixed (see below):That's because, e.g., new int[200][100] creates 200 array objects (and references to each of them), each of which holds 100 ints, while new int[100][200] creates 100 array objects (and references to each of them), each of which holds 200 ints.
Edited by: jverd on Feb 24, 2010 11:17 AM

Drawing multidimensional array values

Hi all,
Need a bit of advice about turning a multidimensional 64x64 array (consisting of doubles) into a picture(!). The array contains a large number of 0.0 values (also known as a sparse matrix). For each value in the array i want to plot a little Rectangle whose colour varies as a function of its value (the values in the array are normalised and range between 0.0 and +1.0). The location of each rectangle on the screen (or Frame/ Panel or whatever) should reflect the position of the value in the array i.e. a value at index myArray[0, 0] should appear in the top left hand corner of the screen (or whatever).
I am not sure which way is the best to achieve this and am eager to hear some suggestions.
Thx in advance

I started going mental last time I thought about picturing multdimensional arrays. I got thinking along the lines that a 2D array looks like a grid, a 3D would look kinda like a cube... but then you hit 4D, and so on, and .... well, my mind just doesn't look like that.
I think maybe the best way to visualize a massive multidimensional array would be almost like a directory structure. ie. One item can expand to have a bunch more items, which would in turn have more items. This is basically what a MD array is. And if you're talking about having to display the data, this might not be a bad arrangement, since you could actually expand/collapse single elements of the array, like a directory tree, and thus have less data cluttering your screen at one time.

Multidimensional Arrays + Me + OOP = Fear

node.java
class node {
     int[][] grid = new int[0][0];
     void detect(){
          System.out.println(grid);
game.java
class game {
     public static void main(String args[]) {
          node a = new node();
          a.detect();
The output of this code is:
http://img237.imageshack.us/img237/6556/outputxy7.png
I am trying to create an imaginary grid so I can implement A* algorithm into my game which will later be an applet.
Why did the output of this come out so weird? I do not understand multidimensional arrays and I struggle to understand object oriented programming.
I have known Java since Nov 2006, but I have always dodge some of this difficult stuff. I am totally self taught and I have been learning through the Internet and a very old Java 2 book. So please speak "dumb" to me.
Thank you,
Andrew.

Oh, grow up. If you get insulted this easily, you'll be inconsolable when you have to get a real job. I'm so sick of these children who want help but also want their genius to remain unquestioned.
Anyway my point wasn't that you altered the image, but rather that you were careless in what you presented as data. Some of the stuff on that image couldn't possibly have worked with the code you posted. (In particular "java node" would not have even run. It wouldn't produce any output at all other than an error message.)
Part of debugging is gathering real, useful, accurate information. And if you want help debugging you have to share real, useful, and accurate information. If you gather output and then change your code, you should at the very least make this clear.

Problems manipulating multidimensional arrays

hello, I am new to java programming. I would like to know some techniques in which i can change the data within multidimensional arrays. For example, with a 2d array, (int [row][column] a), the index of the rows are the columns, and each column contains an element. I would like to know how to, for example, switch the order of the indexes of the rows and columns. So for row 1, the columns (the indexes) are 0,1,2,3. after switching the order, it would be 3,2,1,0. Is there any possible way to do this? a reply would be appreciated. Thank you.

Carefully read the following: given a two dimensional array, we can
define a simple wrapper:public interface ArrayWrapper {
   public int rowDim();
   public int colDim();
   public int get(int row, int col);
   public void set(int row, int col, int value);
}... here's a very simply 'real' ArrayWrapper:public class RealArrayWrapper implements ArrayWrapper {
   private int[][] array; // what it's all about
   public RealArrayWrapper(int[][] array) { this.array= array; }
   public int rowDim() { return array.length; }
   public int colDim() { return array[0].length; } // assume a non-ragged array
   public int get(int row, int col) { return array[row][col]; }
   public void set(int row, int col, int value) { array[row][col]= value; }
}... here's a wrapper that does nothing, given another wrapper:public class NilWrapper implements ArrayWrapper {
   private ArrayWrapper wrap;
   public NilWrapper(ArrayWrapper wrap) { this.wrap= wrap; }
   public int rowDim() { return wrap.rowDim(); }
   public int colDim() { return wrap.colDim(); }
   public int get(int row, int col) { return wrap.get(row, col); }
   public void set(int row, int col, int value) { wrap.set(row, col, value); }
} ... and here's one that reverses all rows:public class RevRowWrapper extends NilWrapper implements ArrayWrapper {
   public RevRowWrapper(ArrayWrapper wrap) { super(wrap); }
   public int get(int row, int col) { return super.get(rowDim()-row-1, col); }
   public int set(int row, int col, int value) { super(rowDim()-row-1, col, value; }
}... do you get the picture?
kind regards,
Jos

Nested IPE (In Place Element) usage when accessing Cluster/Array data via DVR

I am sharing data across several VIs and loops via a DVR, and accessing the data via a DVR IPE. The data is a cluster of arrays. The diagram below (VI attached) illustrates the structures invloved, but not the structure of the application.
(The diagram above does not include initialization of the arrays, as it is intended only to illustrate the Cluster1 data type. Array lengths could be 100.)
The DVR (DVR1) is passed to multiple VIs of the application at startup.
Each VI executes loops that either read or write particular elements of each array (fArray1 or fArray2).
I believe the DVR IPE (B1-DVR) provides blocking so that only one task can modify the data (Cluster1) at any time.
Case 1 illustrates how I currently WRITE to array elements. The outer IPE (block B1) is rolled into a VI (not shown) that takes DVR1, Index, and Value as inputs.
Cases 2 - 4 illustrate 3 additional methods that remove one or both of the inner IPEs (B2-Cluster and B3-Array).
Case 2: IPE B3 (Array Index/Replace Elements) is replaced with a non-IPE 'Replace Array Subset'.'
Case 3: IPE B2 (Unbundle / Bundle Elemnts)' is replaced with a non-IPE cluster 'Unbundle'/'Bundle'.
Case 4: removes both B2 and B3.
I implemented case 1 a long time ago. When I had to do the same thing again recently, I did case 4. When I stumbled across my earlier implementation, I was a bit suprised
Which of the 4 cases should take the least time (or resources) to execute? I think case 4 has as few array allocations as any of the other 3.
The attached image did not capture the Buffer Allocation marks, so I marked the ones that differed with a red "B".
I am only interested in differences in how the arrays are handled, so I see no signioficant differences.
Is this one of those cases where LV doesn't need my help?
Incidently, I recently wrote a small app with shared data and decided to try FGVs to share array data. For small arrays, 10^7 iterations, and an FGV based array-element read followed by a element write, the FGV was faster. 1.2us per read/write for FGV vs 3us per r/w for an DVR/IPE based read/write (like above).
Peter
LV 2011 SP1, Windows 7 64-Bit
Attachments:
IPE.vi ‏9 KB

Option 1 is a definite no and as far as I know it has been NI's explicit intention to steer clear from it. I believe there's an idea in the IE which asks for this.
I agree that option 2 makes sense, but I don't think it should be something the user specifies. Either LV can detect it automatically or it can't, but I doubt NI would let you have an option which creates the possibility for this kind of bug.
I'm not sure, but the mark as modifier option on the IPES might be the option you're looking for. I know that it exists and I know very roughly what it does, but the documentation for it is very limited and I never actually played around with it, as usually I don't need these kinds of optimizations.
You may well be right that a new option on the IPES is desirable and you should probably add it to the idea exchange.
As for NIWeek, I'm not going this year, so I have no idea what kinds of sessions are around, but it's a great place to find people who know what they're talking about and ask them about it directly. Certain people in LV R&D would probably be ideal for this and if you ask relevant people, you might even get their names. I'm sure buying them a beer would also help to loosen their tounges. If you ask me, this type of interaction is the main value of the conference, not the sessions themselves.
Try to take over the world!

Multidimensional array data entry

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