Set Fixed Array Size

Hello. I am trying to develop a VI for an FPGA target and I'm trying to make it so whoever is using the VI can specify the size of an input array when they instantiate it (such as by having an input to the VI that says "max array size" or something). So far it seems like the only way to do something like this is to go into the VI itself and manually set the array size for each input array for the VI (i.e. open the VI, right click on each input array, select "Set Dimension SIze", choose "fixed", set number of elements). I'd like to have one point where I can set the size of all the arrays at once (since in my case they are all the same size), and let the person using the VI set it to the proper size for whatever application they are using it for (to be clear, let's say I have two uses for this VI, and in one case I have an input array of size 100 and in anohter use of size 1000, I'd like to be able to set these somehow instead of doing it through the dialog). Thanks.
Solved!
Go to Solution.

Unfortunately, per-call configuration of array size is not something that is supported today. This is a great idea, I would suggest that you post it on the FPGA Idea Exchange so we can get a feel for how many other people need this same feature.

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How to set the array size

Hi,
below is my sample code
class test
int sample[][]=new int[10][10];
int rows=0,k=0;
int columns=0;
public void meth()
rows=9;
columns=9;
}//end of meth()
public meth_2()
for (int i=0;i<rows;i++)
for(int j=0;j<columns;j++)
sample[i][j]=k;
k++;
for (int i=0;i<rows;i++)
for(int j=0;j<columns;j++)
System.out.println(sample[i][j]);
}//end of meth_2()
public int[][] getList()
return sample;
}//end of classNow that my question is, i need to set the size of array sample[][] to sample[rows+1][columns+1].. but to do so, 'rows' and 'columns' values will only be generated upon the execution of method meth() . I need sample[][] array to be declared right after the class begins. The values that are returned from sample[][] array through that getList() method is been used in another class.. So how do i set the size of sample[][] array to
int sample[][] = new int[rows+1][columns+1];Any response is highly appreciable.
Thanks in advance
Edited by: netbeans2eclipse on Sep 14, 2008 1:20 PM

It seems you answered your question yourself ;-)
Just split this:
int sample[][] = new int[rows+1][columns+1];in two parts.
Declaration:
int sample[][];and instantiation in meth() or meth_2():
sample = new int[rows+1][columns+1];

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Does setiing the array size to a huge no has any affect on the memory, performance and is it considered good programming. If not what are the other options?
String [] arrayString = new String [2354];

Your question is rather ambiguously worded.
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Hello Matt,
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NPI_Chris wrote:
Hello all,
I have a very strange situation here and I am hoping someone can come up with some ideas for me...
I am running labview vi's through a web page, and one of my vi's contains a matlab script with two array inputs, one 2d with a varying length, and the second a 1d array with a fixed set of parameters.
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<< Please do not offer points >>
Edited by: Rob Burbank on Oct 1, 2010 2:53 PM

I have n't tried this scenario,
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Solved!
Go to Solution.
Attachments:
array size.vi ‏10 KB

Hello,
THANK YOU for solving my first issue! Attached is the data set that contains the duplicate entries for the x-axis values. The y-axis value may be different, but not the x. I would like to delete the 2nd row that contains the same x-value.
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29.112000 -116.877052
29.412000 -87.223625
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Attachments:
delete duplicate row.vi ‏8 KB
data.txt ‏1 KB

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Hello All,
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Solved!
Go to Solution.

Make sure you use the same font settings for all the controls that you want to be aligned. You might have some controls set to a specific font name and others left to the default Application font. LabVIEW substitutes the Application font for whatever the system default font is on a particular computer.
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How to adjust a "control array" size

I have a program that creates a digital PWM signal with variable duty cycle. The duty cycle changes every 50 ms, but the overall wave frequency stays at a frequency determined by the user. I have the VI attatched.
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Solved!
Go to Solution.
Attachments:
var_duty_cycle.vi ‏25 KB

Currently, your VI is a one-shot deal. What you need is a state machine that updates the pct duty cycle array control as a function of the frequency while the current I/O code is idle.
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Set Fixed Array Size

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