MathScript adds row to array

Hello LabVIEWers,
I have recently encountered an issue using MathScript that I do not understand. When I create a simple 1 dimensional array and then access a single element within that array, MathScript and/or LabVIEW adds an additional row to that array. This problem becomes apparent when I add the array output to the MathScript stucture and create an indicator. Attached is a sample VI that illustrates the issue I am encountering. I have also run the same MathScript code in MatLab and the issue does not seem to occur. Is there something I am missing? Perhaps a logical reason and explantion for why LabVIEW does this? I have searched the web, help, and forums so far. Any help is appreciated.
My goal is to be able to access elements within an array without changing the dimensions of the array, or having to manually delete the added row.
Regards,
Doug
Solved!
Go to Solution.
Attachments:
ms_adds_row_to_array.vi ‏37 KB
Screen shot 2013-11-09 at 4.17.30 PM.png ‏37 KB

Hello Doug77,
In the line where you are replacing the 5th element of the array, if you say test_array(5)=77, LabVIEW will not add the extra row. Nearly everything in Mathscript if defined as a matrix. That is why you see the size as 1,11. If you try to manipulate the test_array as a 2D array, by saying test_array(1,5), mathscript assumes it to be a 2D array.
Let me know if this helps.
Chinmay Anand Misra
CLD
Technical Marketing Engineer
NI IndRA

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Thanks.

Add Row Button Not Working

I've read the threads and done numerous searches. Not sure why the add row button isn't working, other buttons work.
Here's what I've found and done.
Print button subform - positioned (have tried flowed, too) allow page breaks
Table: body rows vary   -    Insert wrap in subform - subform flowed - allow page breaks
     row 1 binding - repeat row for each data item - min 1, max 25 (why won't it keep an initial count when I try putting in 1 or 0?)
Form properties - preview in dynamic PDF, interactive   -   PDF render format dynamic xml, run in 9.0 or later (to remove errors)
Insert Row Button in Subform Row 1 Cell 1 (not counting header row) on click, JavaScript run at client tried table.row1.instancemanager.addinstance(1);   also tried full path
saved as dynamic pdf
My hierarchy looks like:
form1   [autofit]
     master pages
          page 1
               untitled content area
     printbuttonSubForm [flowed, top to bottom, allow page breaks]
          untitled subform [flowed, top to bottom, allow page breaks]
               printbutton1
          tablesf    [flowed, top to bottom, allow page breaks]
               table1    [allow page breaks]
                    headerRow
                         cell1
                         cell2 etc
                    Row1   [allow page breaks, repeat row for each data item, min 1, max 25 (why won't it keep an initial count when I try putting in 1 or 0?)]
                         subform   [allow page breaks, repeat row for each data item, min 1, max 25
                                        (why won't it keep an initial count when I try putting in 1 or 0?)]
                              button1    table1.row1.subform1.instanceManager.addinstance(1);
                         cell2, etc
     Referenced objects
Questions:
I click the Add Row button, but nothing happens, why? The print button works.
Found a reference to def instances of same row, what does that mean?
Is my hierarchy correct?
How to set Form1 to flow? Object says mixed objects with no options
Many thanks for your assistance! Leslie

Hi Leslie,
There could be a few things.
First check that the form is saved as Dynamic XML in the save as dialog. If it is saved as Static the add instance will not work.
Make sure that the object you are targetting is set to repeat in the Object > Binding tab
Check your syntax in the script editor (button above the editor). Some of your post is not camel case. For example addInstance and instanceManager. Note the capital letter for the second word.
If you could share your form it would be easier to track down what the problem is. You can use Acrobat.com or YouSendIt.com or some other file sharing site. Just remember to post the published URL.
Good luck,
Niall

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