Search element in array and convert to booblean and memorize this boolean
Hi,
I have an array with X cells (variable).On the other hand I have a control string. I want search this control in the array. If I meet it, in the array, a LED will switch on. For example:
cicle nº 1
Array Control
a b LED (a): off
b LED (b): on
d LED (c): off
LED (d): off
LED (e): off
cicle nº 2
If this control changes, now is "d", the LED (d) will switch on, but the LED (b) wil keep switched on.
Array Control
a d LED (a): off
b LED (b): on
d LED (c): off
LED (d): on
LED (e): off
cicle nº 3
If this array changes, all the LEDs will switch off and will start the "memory" of the LEDs.
Array Control
a a LED (a): on
b LED (b): off
c LED (c): off
e LED (d): off
LED (e): off
cicle nº 4
Array Control
a c LED (a): on
b LED (b): off
c LED (c): on
e LED (d): off
LED (e): off
Thank you, and sorry for my english...
Hi, GerdW and cities
sorry for my awful explanation.
Every X time the array update (and can changes the values) only one once. This array contains 7 differents cells (a, b, c, d, e, f and g), and some cells can be empties.
During this time, I recibe, via Data Socket, messages, named string control in the vi added. So in each iteration the program can read only one message.The content of the message is any cell (a, or b, or f,...).
The objective is to show which message are in the array.
PD: I've replace DS by the string control in the vi added.
PD2 (to cities): can you convert your 'vi' to LV 7.1?
Thank you
LV 7.1 /Xp
Attachments:
memory (dont works).vi 52 KB
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OK got to about here BUT
a. I started to get confused around the createEmptyMovieClip part
b. I KNOW I shouldn't have Sound(enemyObjetcs etc... BUT I copied the code from a tutorial and I don't know what to replace it with.
I'm close but I need a little polishing.It doesn't do you much good to work with borrowed code that you do not understand. Your best bet will be to start small, creating one functional piece of the puzzle at a time, and work your way up. Start with making sure you are loading and parsing the xml properly, then set about loading the external content, then see about making that content move around, etc...
In the code you show, your loadMovie line of code does not resemble anything I have seen before, looking more like (but not quite like) a multi-dimensional array element than a loadMovie() function call. If you find you need to have control of the items as soon as they load, then you should consider using MovieClipLoader.loadClip instead of loadMovie. The MovieClipLoader class provides features, such as to be able to determine when items have fully loaded. -
Deleting all elements from array and array to spreadsheet string
Hello,
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Attachments:
testsecond.txt 90 KB
test41.vi 80 KB
testfirst.txt 78 KBA few more comments to your code:
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To clear a 2D array in one case frame, just don't wire the output tunnel and set it to "use default if unwired". You'll get an empty array. No fancy tools needed.
I probably would use an event structure and also protect the data if the save dialog is canceled.
Here's a simple draft that probably requires a bit more work but should show some of the ideas.
You should also
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It would help if you could place some default data into your arrays of the VI and also include an indicator containing the result you want based on the default input.
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I am new to programming.
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Trouble with primitive arrays and casting, lesson 521
hi everyone!
there is a problem i discovered right now - after years with java where was no necessity to do this.....
and i'm shure this must have been the topic already, but i couldn't find any helpful resource :-/
right here we go:
1. an array is a (special) kind of object.
2. there are "primitive" arrays and such containing references to objects. of course - and i imagine why - they are treated differently by the VM.
3. then both are - somehow - subclasses of Object. whereas primitive types are not really, primitive-arrays are. this is hidden to the programmer....
4. any array can be "pointed" at via local Object variable, like this:
Object xyz = new int[6];
5. arrays of Objects (with different dimensions) can be casted, like this:
Object pointer = null;
Object[] o = new SomeClass[42] ;
Object[][] oo = new OtherClass[23] [2] ;
Object[][][] ooo = new OtherClass[23] [2] [9] ;
o = oo = ooo; // this is save to do,
//because "n-dimensional" object-arrays
// are just arrays of other arrays, down to simple array
pointer = o; // ok, we are referencing o via Object "pointer"6. but, you cannot do this with primitive types:
int[] i1 = new int [99] ;
int[][] i2 = new int [1] [3] ;
i1 = i2 // terror: impossible. this is awful, if you ask me.
// ok, one could talk about "special cases" and
// "the way the VM works", but this is not of interest to me as
// a programmer. i'm not happy with that array-mess!
pointer = i2; // now this is completely legal. i2, i1 etc is an object!7. after the preparation, let's get into my main trouble (you have the answer, i know!) :
suppose i have a class, with methods that should process ANY kind of object given. and - i don't know which. i only get it at runtime from an unknown source.
let's say: public void BlackBox( Object x );
inside, i know that there might be regular objects or arrays, and for this case i have some special hidden method, just for arrays... now try to find it out:
public void BlackBox( Object x )
if ( x == null)
return;
Class c = x.getClass();
if ( c.isArray() )
// call the array method if it's an array.........
BlackBoxes( (Object [] ) x ); // wait: this is a cast! and it WILL throw an exception, eventually!
return;
else
DoSpecialStuffWith( x );
}ok ? now, to process any kind of array, the special method you cannot reach from outside:
private void BlackBoxes( Object[] xs )
if ( xs != null )
for ( Object x : xs )
BlackBox( x );
// this will end up in some kind of recursion with more than one array-dimension, or when an Object[] has any other array as element!this approach is perfectly save when processing any (real) Object, array or "multi-dimensional" arrays of Objects.
but, you cannot use this with primitive type arrays.
using generics wouldn't help, because internally it is all downcasted to Object.
BlackBox( new Integer(3) ) ---- does work, using a wrapper class
BlackBox( new Integer[3] ) ----- yep!
BlackBox( 3 ) ---- even this!
BlackBox( new int[42] ) ---- bang! ClassCastException, Object[] != int[]
i'm stuck. i see no way to do this smoothly. i could write thousands of methods for each primitive array - BlackBox( int[] is ) etc. - but this wouldn't help. because i can't cast an int[][] to int[], i would also have to write countless methods for each dimension. and guess, how much there are?
suppose, i ultimately wrote thousands of possible primitive-type methods. it would be easy to undergo any of it, writing this:
BlackBox( (Object) new int[9] [9] );
the method-signature would again only fit to my first method, so the whole work is useless. i CAN cast an int[] to Object, but there seems no convenient way to get the real array out of Object - in a generic way.
i wonder, how do you write a serialisation-engine? and NO, i can't rely on "right usage" of my classes, i must assume the worst case...
any help appreciated!thanks, brigand!
your code looks weird to me g and i think there's at least one false assumption: .length of a multidimensional array returns only the number of "top-level" subarrays. that means, every length of every subarray may vary. ;)
well i guess i figured it out, in some way:
an int is no Object;
int[ ] is an Object
the ComponentType of int [ ] is int
so, the ComponentType of an Object int[ ] is no Object, thus it cannot be casted to Object.
but the ComponentType of int [ ] [ ] IS Object, because it is int [ ] !
so every method which expects Object[], will work fine with int[ ] [ ] !!
now, you only need special treatment for 1-dimensional primitive arrays:
i wrote some code, which prints me everything of everything:
//this method generates tabs for indentation
static String Pre( int depth)
StringBuilder pre = new StringBuilder();
for ( int i = 0; i < depth; i++)
pre.append( "\t" );
return pre.toString();
//top-level acces for any Object
static void Print( Object t)
Print ( t, 0);
//the same, but with indentation depth
static void Print( Object t, int depth)
if ( t != null )
//be shure it is treated exactly as the class it represents, not any downcast
t = t.getClass().cast( t );
if ( t.getClass().isArray() )
//special treatment for int[]
if ( t instanceof int[])
Print( (int[]) t, depth);
// everything else can be Object[] !
else
Print( (Object[]) t, depth );
return;
else
System.out.println( Pre(depth) + " [ single object:] " + t.toString() );
else
System.out.println( Pre(depth) + "[null!]");
// now top-level print for any array of Objects
static void Print( Object [] o)
Print( o, 0 );
// the same with indentation
static void Print( Object [] o, int depth)
System.out.println( Pre(depth) + "array object " + o.toString() );
for ( Object so : o )
Print( so, depth + 1 );
//the last 2 methods are only for int[] !
static void Print( int[] is)
Print( is, 0 );
static void Print( int[] is, int depth)
System.out.println( Pre(depth) + "primitive array object " + is.toString() );
// use the same one-Object method as every other Object!
for ( int i : is)
Print ( i, depth + 1 );
System.out.println( "-----------------------------" );
}now, calling it with
Print ( (int) 4 );
Print ( new int[] {1,2,3} );
Print( new int[][] {{1,2,3}, {4,5,6}} );
Print( new int[][][] {{{1,2,3}, {4,5,6}} , {{7,8,9}, {10,11,12}}, {{13,14,15}, {16,17,18}} } );
Print( (Object) (new int[][][][] {{{{99}}}} ) );
produces this fine array-tree:
[ single object:] 4
primitive array object [I@9cab16
[ single object:] 1
[ single object:] 2
[ single object:] 3
array object [[I@1a46e30
primitive array object [I@3e25a5
[ single object:] 1
[ single object:] 2
[ single object:] 3
primitive array object [I@19821f
[ single object:] 4
[ single object:] 5
[ single object:] 6
array object [[[I@addbf1
array object [[I@42e816
primitive array object [I@9304b1
[ single object:] 1
[ single object:] 2
[ single object:] 3
primitive array object [I@190d11
[ single object:] 4
[ single object:] 5
[ single object:] 6
array object [[I@a90653
primitive array object [I@de6ced
[ single object:] 7
[ single object:] 8
[ single object:] 9
primitive array object [I@c17164
[ single object:] 10
[ single object:] 11
[ single object:] 12
array object [[I@1fb8ee3
primitive array object [I@61de33
[ single object:] 13
[ single object:] 14
[ single object:] 15
primitive array object [I@14318bb
[ single object:] 16
[ single object:] 17
[ single object:] 18
array object [[[[I@ca0b6
array object [[[I@10b30a7
array object [[I@1a758cb
primitive array object [I@1b67f74
[ single object:] 99
-----------------------------and i'll have to write 8 methods or so for every primitive[ ] type !
sounds like a manageable effort... ;-) -
When I open the kindle app on iPad 2 I have to search for the correct page. Does anyone else have this problem?
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How do I search and return multiple elements of array quickly (like Matlab find)?
Hi, I am a fairly experienced Labview programmer, and I have always wondered if there is a way to quickly search arrays for multiple elements that meet a selection criteria, equivalent to the Matlab find command. While my inability to do this in Labview has always bugged me, I now have an application that requires this ability and I need to find a solution.
The fastest way that I have found to do this in labview is to perform comparisons on vectors of data, and then use the resulting Boolean vector to parse the array using a for loop and shift registers. I have attached a vi snippet of a benchmarking vi for one of the simple searches I need to do. On my laptop this search takes about 600ms. In comparison, the equivalent in Matlab:
newArray=oldArray(find(oldArray(:,4)./oldArray(:,2)>1.5),;
executes in about 1.2ms. So, the way that I am doing this in Labview is only 400 times slower
Needless to say, I need to do these types of searches many many times, and those 599 extra ms start to add up pretty quickly!
Thanks for your help,
Aaron
Solved!
Go to Solution.
Attachments:
benchmarkSearch.png 641 KBHi Aaron,
the slowest part is probably the "build array" node in the loop.
Try this:
Define an array of same size as input data (or simply use a copy of it) and wire that to the shift register. Keep a counter of found rows in the loop. Use IndexArray and ReplaceArraySubset in the loop to move the found rows to beginning of array (overwrite "bad" rows). After the loop simply ReshapeArray to the number of found rows...
Sorry, don't have LV(2009) at hand to edit your snippet.
Message Edited by GerdW on 11-20-2009 08:27 PM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
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Converting from spreadshet string to array and then back to spreadsheet string
My questions is; why is the Spreadsheet string to array function creating more data than the original string had when you change the array back into a spreadsheet string. Im trying to analyze a comma delimited file using array functions since my column and row size is constant, but my data varies. Thus my reason for not using string parsing functions which would get more involved and difficult. So, however, after i convert to a 2D array of data from the comma delimited file I read from, and then I convert back to string using the Array to Spreadsheet String, I get added columns to the file, which prevents another program from receiving these files. Also, the data which I am reading is not all contiguous, it has gaps in some places for empty data. Looking at the file compared to the original after it has gone from string to array and then back to string again, looks almost identical except for the file size which got larger by 400 bytes and where the original file has empty spaces, the new file has a lot of commas added. Any idea?
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Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left... -
Convertion to integer from array and logical mask
hi all.
please look at my VI.
1)i want to convert this array to 4 display. each displaywill show one element(=1 row, in this case) from the array.
how i do it ?
2) i need to make logical mask to those numbers. how i convert the integer number to binary and make this logical mask ?
with best regards
pro111
Message Edited by pro111 on 12-02-2006 05:41 PM
Attachments:
Untitled 2.vi 6 KBHi pro,
I did not follow you and came up with another example while Christian was doing his.
This is my guess at what I thought you were asking.
Ben
PS Christian, I am not trying to side step your example. I figured if I drew it up I should post.
PPS talk about a post collision!
Message Edited by Ben on 12-03-2006 12:32 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
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New to Java: Populating Arrays and searching
I am really stuck. I need to know how to search for an array that is already populated. The user will type in a string, and the string must match with one of the populated array. What is the best way to go?
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I have Adobe Photoshop Elements 10 plus I create PDF files for work some are scan pdf docs. When I install Photoshop Elements 10 it DOES convert all the PDF files to Photoshop Elements-10 Docs. it even changes and shows the PSE-10 Icon. So I am alway installing PSE-10 or uninstalling it. If I send the PDF file that has been automatically converted to a PSE-10 the person I send the file to can not open it because they do not have PSE-10. What can I do to stop PSE-10 from converting my PDF files? Don't tell me to upgrade PSE-10 I tried their on-line program and it is too advance for a hobby photographer like myself and their Help Desk is impossible to reach.
Hi,
Can you please share the logs?
You can use the Adobe Log Collector tool (Log Collector Tool) and share the corresponding zip file @ [email protected]
Thanks,
Shikha -
In the vi that I am writing I have rise and fall times to post in a very specific pattern. I can initialize an array,and I can replace elements, but in "replace element" I only find that I am given the choice of specifying a single dimensional position. I need to be able to specify BOTH column and row. Can anyone help me?
Hi Jryan !
If you wire a 2D array to the input of a "replace element" function, you will see that the function expand to display an additionnal index. The one you are looking for !!
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...
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