Añadir fila a array autoindexing for loop

Hola a todos,
Quería saber como puedo hacer para añadir una fila automaticamente a un array cada vez que se produce un cambio en mi array "Introducir datos". Creo que la solución es el tema de crear un bucle for y el autoindexing. Para que me entendais mejor he puesto en el vi adjunto un bloque que hace lo mismo que pretendo conseguir, pero teniendo que pulsar un botón.
Muchas gracias
Adjuntos:
(Ejemplo).vi ‏8 KB

Hola Davidll,
Te adjunto un VI que añade una fila a una array cuando se cumple una condición. En este caso la condición es presionar un boton booleano.
Fijate que hemos usado una variable local para escribir sobre la matriz que ya existe y simplemente con la función "Build array" añadimos una fila nueva con los valores de nuestro control "Fila a insertar" que noes más que una array de una dimension.
Si tienes algún otro problema con arrays recuerda que dispones de una gran cantidad de ejemplos básicos en la pestaña Help/Find examples..
Son bastante útlies y explicativos.
PD:El boton esta configurado como "Latch when pressed" en la "Mechanical Action" para que solo produzca un pulo a nivel alto y velva a estado bajo. Sino produciria pulsos constantemente y se añadirian infinitas filas a nuestra array.
Que pases buen día!
Adjuntos:
AddRowtoArray.vi ‏12 KB

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Build 1D array using for loop

Hi guys,
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Nextal wrote:
I am testing out array. How do I create a 1D array of x-y using for loop?
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Remove text field from Array via for loop

Hi,
i have a problem to remove text fields added via for loop.
That im doing is, via for loop im dynamically creating menu with 10 buttons.
Each button contain, dynamically created, background (shape) and text field.
And everything is fine.
But when im try to remove text fields then i got this error:
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ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
          at flash.display::DisplayObjectContainer/removeChild()
          at Loading_Img_fla::MainTimeline/xmlLoaded()
          at flash.events::EventDispatcher/dispatchEventFunction()
          at flash.events::EventDispatcher/dispatchEvent()
          at flash.net::URLLoader/onComplete()
In the script bellow marked with red is what should remove text fields from an Array, instead giving me error.
Here is my script
// Create for loop
for (var i:int = 0; i < 10; i++)
          for each (xml in listItems)
                    if (i == xml.attribute("Id"))
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                              lmNameArrayUS = new Array();
                              // Create local variable to hold
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                              var lmTxtFieldContentEG:String;
                              var lmTxtContent:String;
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                              // If clicked button is US then make array with English text
                              if (footer.lang_btn.langState == "EG")
                                        for each (var leftMenuName:XML in egLanguageList)
                                                  lmNameArrayEG.push(leftMenuName);
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                                        lmTxtContent = lmTxtFieldContentEG;
                              else
                                        for each (var leftMenuNameUS:XML in usLanguageList)
                                                  lmNameArrayUS.push(leftMenuNameUS);
                                        lmTxtFieldContentUS = lmNameArrayUS[i];
                                        lmTxtContent = lmTxtFieldContentUS;
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                              lmTxtFieldsArray[i].width = 110;
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                              lmTxtFieldsArray[i].x = 10;
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                              else
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          btCount++;

it looks like those tf's are children of lmButtonsMCArray[i], not the current scope. use:
if (footer.lang_btn.langState == "EG")
                                        for (var rNr_us:Number = 0; rNr_us < pushUsTFintoArray.length; rNr_us++)
                                                  //remove the text field array from the display
                                    lmButtonsMCArray[rNr_us].removeChild(pushUsTFintoArray[rNr_us]);
                                        //clear the array
                                        pushUsTFintoArray = [];
                              else
                                        for (var rNr_eg:Number = 0; rNr_eg < pushEgTFintoArray.length; rNr_eg++)
                                                  //remove the text field array from the display
                                    lmButtonsMCArray[rNr_eg].removeChild(pushEgTFintoArray[rNr_eg]);
                                        //clear the array
                                        pushEgTFintoArray = [];

Set file position within a for loop, error 1

Hi, I'm reading from a .sxm file consisting of a large chunk of text followed by binary data for 512x512 images with 4 bytes per pixel
I’ve managed to successfully identify the start of the binary and read the first image from the file and view it using "flatten pixmap.vi", so I’m doing something right, however when i try to read the next chunk of image data in the .sxm file using a for loop, set file position keeps churning out ERR (1).
im at a loss as to whats causing this
Solved!
Go to Solution.
Attachments:
binaryread3d trouble.vi ‏22 KB
back panel screenshot.png ‏27 KB

I closed the file in the loop, doh! ... another morning well spent

Convert array of clusters to cluster of arrays without for loop

Hi!
Here's a problem: I've got an array of clusters (array of messages). Each cluster consists of elements of different data types: double (time), cluster (parameters), char (station id), byte (message code). I know one cluster size and the array size. I need to draw a time graph. How can I convert the array of clusters to a cluster of arrays (array of time values, array of parameters clusters, arrays of chars and bytes).
I post this question because in my real array of clusters each cluster consists of 162 elements and some of them are clusters themselves, so I realy dont want to wire "for" loops as was advised in other topics.
Hope to get fresh ideas. Memory management? Type Cast? FlatternStrings and variants? Anything!
Thank you.

Idea wrote:
Hi, everybody! Glad you read the post!
There is the cluster in the attachment. The application I make is a TCP client. The cluster is a message. Actually I get a string, find edges ("DIAG" - begin, "GAID" - end) and then I use "unflattern to string" for making the cluster. I cann't make another structure of the message - I didn't make the server. My client has a buffer of recieved messages. I need to plot graphs of different cluster elements for all messages in my buffer (for example the Time 1 element). If I use the for loop it would be too slow. The idea was to convert all buffer to a 2D array of U8 and then use type cast to get the cluster of arrays. Then it would be easy to take ane cluster element and send it to graph.
I didn't sucseed yet.
Idea.
What is your question about?
A) convert the string you get from I don't know where to the giant cluster, the red part in your message, or
B) making a graph out of some element from that giant cluster, who now is in an array, the blue part in your message.
The code you showed us looks a solution for question A but no loop is needed for this. So why bother about a loop that would be too slow here?
Also your code start from an array of U8, so where's the string?
If you could provide a string that needs conversion, we could try another way ... ...
Question B can easily be solved with a for loop and "unbundle by name". Don't know where you get the idea that a loop would be too slow
Open G library has a lot of VI's to retrieve specific elements from clusters, maybe one of those could help solve the problem.

How do i use Arrays and For Loops in Loading Multiple Images?

I am struggling to load a sequential array of images to appear like a moving image. So when u click the button the images load one after the other.
The code below is what i have so far, but it fails to do what i seek in that there's only one image loading which is the last image in the array, so either because the images are stacking up atop each other, or because i simply dont understand the basics...
And, i am unclear about what you said kglad, that my solution will be more complicated because i need to preload my image sequence and then use a loop to load it?
import flash.net.URLRequest;
import flash.display.Loader;
var count:int = 0;
var imageArray:Array=["1.jpg","2.jpg","3.jpg","4.jpg","5.jpg","6.jpg","7.jpg",
"8.jpg","9.jpg","10.jpg","11.jpg","12.jpg","13.jpg"];
for(var i:uint=0;i<imageArray.length;i++){
var btn:YourButton=new YourButton();
btn.ivar=i;
addChild(btn);
btn.x=0;
btn.y=0;
btn.addEventListener(MouseEvent.CLICK,clickF);
var ldr:Loader=new Loader();
addChild(ldr);
ldr.x=20;
ldr.y=20;
function clickF(e:MouseEvent){
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function loadComplete(e:Event){
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function loadCurrentImage(){
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     ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);

create a new fla, add btn and add the code i suggested. test.
var count:int;
var imageArray:Array=["1.jpg","2.jpg","3.jpg","4.jpg","5.jpg","6.jpg","7. jpg",
"8.jpg","9.jpg","10.jpg","11.jpg","12.jpg","13.jpg"];
var ldr0:Loader=new Loader();
ldr0.contentLoaderInfo.addEventListener(Event.COMPLETE,loadCompleteF);
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ldr1.contentLoaderInfo.addEventListener(Event.COMPLETE,loadCompleteF);
btn.addEventListener(MouseEvent.CLICK,clickF);
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// initialize count
count=0;
// call loadF
loadF();
function loadF():void{
// add one of the loaders to the top of the displaylist and load the next image
addChild(this["ldr"+count%2])
this["ldr"+count%2].load(new URLRequest(imageArray[count]));
function loadCompleteF(e:Event):void{
// increment count
count++;
// check if the last has loaded
if(count<imageArray.length){
// if not clear the content out of the next loader.
if(this["ldr"+count%2].content){
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Using while loops instead of for loops in arrays?

I am new to java and doing a java tutorial on using arrays and for loops. What im trying to find out is how it is possible to use a while loop instead.
I would be very grateful if anyone can suggest a way of changing my code to use a while loop.
The code I have written is:
public class DetermineGrade
public static void main(String[]args)
final char[] mark = {'A','B' ,'C' ,'D' ,'F' };
char [] grade = new char[5];
int [] Score ={95,35,65,75};
for (int i=0; i<4; i++)
if (Score >= 90)
grade= mark[0] ;
else if (Score >=80)
grade = mark[1] ;
else if (Score >=70)
grade = mark[2] ;
else if (Score >=60)
grade = mark[3];
else grade = mark[4];
for (int i=0; i<4; i++)
System.out.println("grade = " + Score + ", " + grade);
Thankyou LB

Im trying to underdstand the differences in the
different loops. I can grasp the for loop but I dont
see how a while loop works, or how it id different
from the other?
for (j = INIT; j < MAX; j++) {
    // do stuff
}is the same as
j = INIT;
while (j < MAX) {
    // do stuff
    j++;
}Lee

Help on changing array elements with For loop

Hi,
I'm wondering if anyone can help me with this problem. I'd like to be able to modify elements of an array with For loop. In the attached VI, my goal is to have an array of [0 1 2 3 4 5], but instead what I've got is [2 2 2 2 4 5]. I initialized the array with a value of 2 to help me identify which elements are changing. Can anyone help me pointing where my mistake is? Thanks.
Peter
Attachments:
Array test.vi ‏19 KB

It's a classic issue for LV newbies. In this case you HAVE to use a
shift register otherwise the modifications of previous cicles are lost.
It's all easier than it's seems, see attached vi.
bye,
manga
Attachments:
Array test 2.vi ‏19 KB

For Loop with Error Check

Hello all,
As per my sample VI.
I gave Empty array to For Loop. As we know this Loop will not execute because N value “0”.
But, I want to know why Error out always giving True value. This Error Indicator value changing to “True” irrespective of Error In.
BR,
Munna
Munna
Solved!
Go to Solution.

That''s exaclty what I said.
If you use plain tunnels and the loop iterates zero times, the output will give the default value for the datatype, which is FALSE for errors.
If you use shift registers, whatever is wired to the initializer terminal will be output unchanged on the right if the loop iterates zero times. Since you initialize with a error=TRUE, that's what you get.
This is all as expected. In your first post you claimed that the output is error=true using plain tunnels, which cannot be. Agreed?
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LabVIEW Champion . Do more with less code and in less time .

Using a For loop to call one array element at a time

I have been working on a VI that reads a GPS unit, parses the data, outputs what I need, compares the actual GPS location to the desired location, determines a desired heading and moves on from there. My question pertains to the number of desired locations I can input right now. I need to be able to input a predtermined number of locations (not just the one that I can input right now). I was told that it is possible to use a For Loop with an array and have the first set of Lat and Long values run through the VI and when everything is complete that the next set of values will be chosen. Does this mean that I need to put the entire VI inside a For Loop and have the array update as soon as the VI has completed its first mission? I understand the concept of how this work from other programming languages but I'm not sure how to implement the solution in LabVIEW. Any help would be appreciated.
Adam

adamoutlaw wrote:
Here is a portion of the VI. I need two separate arrays, one for Latitude and one for Longitude, of the same size.
I don't see any arrays in your code. Do you want to generate arrays form individual data points or do you want to process arrays, one element at a time? Both can take advantage of autoindexing. Here's a simple picture.
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Message Edited by altenbach on 08-02-2007 07:14 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
Indexing.png ‏4 KB

For loop and xml - how to point the right content in a XML file with a dynamically created button?

Hi Everybody,
as my first experience in AS3 I'm bulding a photo multigallery. In that gallery I have some buttons, each one pointing to its respective set of images.
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I've tryied several different methods, with no effect, to make each loop to give to each button an unique identity to load the respective set of images.
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var imagesContainer:MovieClip = new MovieClip();
imagesContainer.x=10;
imagesContainer.y=10;
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xmlLoader.addEventListener(Event.COMPLETE, whenLoaded);
xmlLoader.load(new URLRequest("XML/roiaXML.xml"));
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Here is my XML:
<GALERIA galeriaTitle="galeria 01">
<IMAGE imageTitle="imageTitle01">feio.jpg</IMAGE>
<IMAGE imageTitle="imageTitle02">muitofeio.jpg</IMAGE>
<IMAGE imageTitle="imageTitle03">aindamaisfeio.jpg</IMAGE>
</GALERIA>
<GALERIA galeriaTitle="galeria 02">
<IMAGE imageTitle="imageTitle01">estranho.jpg</IMAGE>
<IMAGE imageTitle="imageTitle02">maisestranho.jpg</IMAGE>
<IMAGE imageTitle="imageTitle03">aindamaisestranho.jpg</IMAGE>
</GALERIA>
Thanks everyone . ABSTRATO

you can assign each newSetButtonMC and ivar property that points to its i value or, even easier:
// CREATE MENU CONTAINER //
var menuContainer:MovieClip = new MovieClip();
menuContainer.x=10;
menuContainer.y=300;
addChild(menuContainer);
// CREATE IMAGES CONTAINER //
var imagesContainer:MovieClip = new MovieClip();
imagesContainer.x=10;
imagesContainer.y=10;
addChild(imagesContainer);
//// LOAD XML ////
var xmlLoader:URLLoader = new URLLoader();
xmlLoader.addEventListener(Event.COMPLETE, whenLoaded);
xmlLoader.load(new URLRequest("XML/roiaXML.xml"));
var xml:XML;
function whenLoaded(evt:Event):void {
     xml=new XML(evt.target.data);
     var mySetsList:XMLList=xml.children();
     //// MENU BUTTONS ////
     // CREATE ARRAYS //
     var totalArray:Array = new Array();
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     var setNamesArray:Array = new Array();
     // POSITIONING BUTTONS INSIDE MENU CONTAINER//
     var rowsQuantity:Number=3;
     var columnsQuantity:Number=Math.ceil(mySetsList.length()/rowsQuantity);
     var cellWidth:Number=160;
     // CREATE BUTTONS //
     for (var i:int=0; i< mySetsList.length(); i++) {
          var newSetButtonMC:setButtonMC=new setButtonMC();
          //what do I do here to make it works? To give each button created a unique id.
          setNodesArray.push(i);
          //trace(setNodesArray);
          var imageNodesArray:Array = new Array();
          for (var j:int=0; j<mySetsList[i].IMAGE.length(); j++) {
               imageNodesArray.push(mySetsList[i].IMAGE[j].attribute("imageTitle"));
         nextSetButtonMC.imageArray = imageNodesArray;
          //totalArray.push(imageNodesArray);
          newSetButtonMC.setButtonText.text=mySetsList.attribute("galeriaTitle")[i];
          newSetButtonMC.setButtonText.autoSize=TextFieldAutoSize.LEFT;
          var cellX:Number=Math.floor(i/rowsQuantity);
          var cellY:Number=i%rowsQuantity;
          newSetButtonMC.x=cellX*cellWidth;
          newSetButtonMC.y=cellY*(newSetButtonMC.height+10);
          newSetButtonMC.addEventListener(MouseEvent.CLICK, onClick);
          menuContainer.addChild(newSetButtonMC);
     totalArray.push(setNodesArray);
     //// MENU BUTTONS ACTIONS ////
     function onClick(mevt:MouseEvent):void {
          var mc:setButtonMC=setButtonMC(mevt.currentTarget);
for(i=0;i<mc.imageArray.length;i++){
trace(mc.imageArray[i]);
Here is my XML:
<GALERIA galeriaTitle="galeria 01">
<IMAGE imageTitle="imageTitle01">feio.jpg</IMAGE>
<IMAGE imageTitle="imageTitle02">muitofeio.jpg</IMAGE>
<IMAGE imageTitle="imageTitle03">aindamaisfeio.jpg</IMAGE>
</GALERIA>
<GALERIA galeriaTitle="galeria 02">
<IMAGE imageTitle="imageTitle01">estranho.jpg</IMAGE>
<IMAGE imageTitle="imageTitle02">maisestranho.jpg</IMAGE>
<IMAGE imageTitle="imageTitle03">aindamaisestranho.jpg</IMAGE>
</GALERIA>
Thanks everyone . ABSTRATO

How to index array in a for loop

i'm connecting from variant-to-data function to an index array function inside a for_loop (refer to attachment). the data-type wire got converted from Table(2-D array) to Table(1-D array). How do I keep it from converting to 1-D array?
Attachments:
arrayI.doc ‏146 KB

Of course it seems you want to run the loop once for each row in the 2D array, so many times autoindexing is the better solution!
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Since you are a LabVIEW beginner, you should try to stay way from stacked sequences and local variables. They are rarely needed and can ofter cause problems such as race conditions and unreadable code.
Message Edited by altenbach on 03-31-2008 04:17 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
autoindexing.png ‏8 KB

How to output last 4 arrays from a For Loop?

Hi People,
I am almost at the end of my tether. I really hope someone could please help me.
Any input would be welcome. VI attached.
VI explanation:
I initialize an array.
The random number generator simulates my camera input.
Depending on which iteration it is, the data is added into one of four output arrays.
'x-y*floor(x/y)' gives a remainder value of 0, 1, 2 or 3.
'Case Selector' just adds 1 to 'x-y*floor(x/y)' to get case 1, 2, 3 or 4.
Shots 1, 5, 9 etc are added to Array 1 (Case 1).
Shots 2, 6, 10 etc are added to Array 2 (Case 2).
Shots 3, 7, 11 etc are added to Array 3 (Case 3).
Shots 4, 8, 12 etc are added to Array 4 (Case 4).
Averaged Output displays the averaged value i.e. the total value divided by the number of shots saved in that array ('Set (IQ+1)').
My problems are:
1) I would like to output only the last 4 sets of data from the Averaged Output 1, 2, 3 and 4 to 4 different files (i.e. save as .csv what is displayed onscreen in indicators 'Averaged Output 1', 2, 3 and 4 at the end of all iterations.
Where should I place my file save diagram disable so that it does this?
Putting it outside the main For Loop with auto-indexing on gives me one file with all previous data. (This is not feasible as my number of shots should number in the thousands)
Putting it outside the main For Loop with auto-indexing off gives me only the last set of data. (I need the output for 4 Arrays, not just the last run)
Putting it inside the main For Loop (as shown) gives me the same number of files as number of iterations. (Again not feasible due to large number of files that will be generated and slow camera capture)
For the sake of fast camera capture, I would like these 4 files to only output once all the image captures are complete.
2) Would preferably like to name the file once and for the programme to append '(1)', '(2)', '(3)' and '(4)' to filename of the appropriate 'Averaged Output' Arrays but file path controls are another big headache for me.
3) P.s. is initializing one array enough to avoid using Memory Manager? Or should I initialize 4 arrays?
I am using Labview 2010.
Thanks so much,
Jaslyn
Solved!
Go to Solution.
Attachments:
Help Understanding Arrays and file paths (10).vi ‏26 KB

Thanks so much Lennard!!
Hi JKSH,
I've been busy trying to complete the dang code, but for completeness so that other users can learn too, I shall answer your queries. Thanks for looking in.
First, what do you mean by "add"? Your code in your case strcuture sums your input values, so your array size doesn't change. However, you also said "Putting it outside the main For Loop with auto-indexing on gives me one file with all previous data. (This is not feasible as my number of shots should number in the thousands)" -- it sounds like you are expecting an array with thousands of elements. So, what should "Output Array N" look like?
Ans: Output Array N should be a 4x4 array of the summation of all the numbers generated during every 4th iteration.
i.e. if random number 1=1, random number 2=2, etc, And 'No of iterations' is 12,
Output Array 1 should be 1+5+9:
15 15 15 15
15 15 15 15
15 15 15 15
15 15 15 15
(Note: Most of your arrays are 4x4, but in Case #2 you created 128x128. I prersume this is a typo?)
Ans: Kind of, I'm using a 4x4 array of randomly generated numbers as an example but my actual data will be the 128x128 pixel output of a camera. And during actual experimentation, 'No of Iterations' will number in the thousands.
Second, why do you add your "simulated camera input" to the "Initialized Array"? You can add it direcly to the previous output inside your case structure.
Ans: See answer to question 3
Third, have a look at shift registers: http://www.ni.com/gettingstarted/labviewbasics/shiftregisters.htm. Use them instead of Feedback Nodes to make your code tidier.
Ans: I did try.. But I can't seem to add shift registers to the case structure, only the for loops outside. Are you sure it can be done..?
jaslyn wrote:
1) I would like to output only the last 4 sets of data from the Averaged Output 1, 2, 3 and 4 to 4 different files (i.e. save as .csv what is displayed onscreen in indicators 'Averaged Output 1', 2, 3 and 4 at the end of all iterations.
Where should I place my file save diagram disable so that it does this?
For the sake of fast camera capture, I would like these 4 files to only output once all the image captures are complete.
You will need to call "Write to Text File.vi" 4 times to write 4 files. So, you should finish your loop, then call this VI 4 times.
Ans: How do I get it to extract the data from each of the 4 cases in my case structure?
jaslyn wrote:
2) Would preferably like to name the file once and for the programme to append '(1)', '(2)', '(3)' and '(4)' to filename of the appropriate 'Averaged Output' Arrays but file path controls are another big headache for me.
You can create strings first, then convert them into paths: http://zone.ni.com/reference/en-XX/help/371361G-01/glang/string_to_path/
Thanks
jaslyn wrote:
3) P.s. is initializing one array enough to avoid using Memory Manager? Or should I initialize 4 arrays?
I'm not sure what you're asking; can you please clarify what you mean by "avoid using Memory Manager"? But anyway, you've actually initialized FIVE arrays: 1 outside the loop, and 1 inside each case.
I've read that to avoid fluctuations in memory usage, it is a good idea to initialize arrays to their expected size before the start of data collection. That was just what I was trying to do.

Building an array from a for loop.

Hi all
I have a vi which reads from a file and manipulates the data using for loop. I am taking each element and multiplying it with a constant and converting it to I32. I would like to build back to a new array with the new values. I have attached the vi and a sample data file to read from.
Please suggest if there are any better ways to do this.
Thank you.
Solved!
Go to Solution.
Attachments:
file_read.vi ‏11 KB
file_read.txt ‏1 KB

You can multiply the array with the constant and use the array instead of multiplying it with each element.
The best solution is the one you find it by yourself

Añadir fila a array autoindexing for loop

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