Matlab script of labview keeps executing multiple times,

i have some code for serial communication in matlab , i want to use it in labview for easier and better gui design. for that i have used matlab script node in labview. it seems that labview keep executing the matlab script but i want labview to execute it only once.is there any way to do it?
Solved!
Go to Solution.

i am attaching a vi file. this vi sends 'h' to the com1 continuously but i waant it to send only once.
Attachments:
forum.vi ‏7 KB

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Using Matlab script in Labview

Hello,
I am trying to use matlab script in labview to post process the sampled signals from DAQ(attached is the vi I tried)
After every 10 seconds I want to the send the sampled voltage data to matlab scritp block which does 1) detection of peaks using peakdetection function and plots the obtained peaks on the sampled signal 2) calculates standard of 10 secs data and plots on chart.
But I am confused of 1) how to call the peakdetection function inside the matlabscript block
2) How to send the 10secs data of voltage and time values to the matlab script block
3) How to plot the signal and detected peaks on the same plot (which can be done in matlab using holdon as shown in the atached vi).
Can someone suggest for implementing these .
Thanks.
Solved!
Go to Solution.
Attachments:
Labview&Matlab.vi ‏55 KB

Thanks GabeG,
Now, Labview&Matlab_TestNoAq.vi is woking Good and for the second one Labview&Matlab_TestAq.vi it is showing error as shown in the attached image when these ines of code are present in the matlab scrtip
subplot(2,1,1),plot(maxtab(:,1),maxtab(:,2),'*r');
SDN=std(maxtab(:,1));
and SDN output of the Matlab script
but when I removed these it is working fine(but not showing the detected peaks).
Can you suggest me a solution for the above and also can I know the best method to add one more channel that samples another device signal which has to be processed in this same way(Signals sampled from 2 devices have to be porcessed in this same way).
Thanks.
Attachments:
Script_Error.JPG ‏133 KB

Matlab script in Labview

Hi there,
I want to integrate my Matlab script in Labview,
the input variable should be a Matrix like
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hi chris .. thanks for the reply ...
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Operating System: Microsoft Windows XP Version 5.1 (Build 2600: Service Pack 2)
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Same code gives different results in Matlab Script in Labview and Matlab

I am implemeting a Matlab code into a LabVIEW application using Matlab script. When I import the exactly same code to the Matlab Script in LabVIEW it gives a different result than it is in Matlab. This code is a simulation code including first kind bessel functions. Using LabVIEW 7.1 and Matlab R14 service pack 3.

Labview 8.5
Matlab R2009b
Attached are the graphs produced by matlab script in labview and in matlab.
The minimum of graph produced by matlab code is below 1 and that in labview is above 1.
Thanks a lot for your reply.
Sorry, I haven't quantified the "sometimes" yet.
Attachments:
matlabsResult.jpg ‏29 KB
LV.png ‏84 KB

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Hi Developers,
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Hi ALL,
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hi,
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Query executing multiple times

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thnks Frank for your reply.
Ideally this query is supposed to run when the page is loaded however it has a complex calculation which takes 28 secs to complete. In order to load the page fast we dragged and dropped the collection as a table and added a button which executes the query. So the query gets executed on page load with a condition set as false so that no data is fetched - to speed the page load. However when we press the Refresh button the query gets re executed but as you can see 2 times. I can see the same effect on a nos of tables.

Traité une image par matlab script sur Labview

salut!! j'ai un programme Matlab qui fait le traitement d'image , je veux l’exécuter sous Labview et recevoir le resultas sous Labview auss . je sais pas comment faire la conversion Array to image si quelqu'un Peut m'aider Merci !!
ci joint le programme utilise
Attachments:
Matlab script.jpg ‏59 KB

Hello !!
sorry for being late in my answer , I had to finnish other work!! and thank you for answering
here are the uses of the functions that you asked me, from the help of Matlab !!
IMFILTER N-D filtering of multidimensional images.
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Finally as you can see in the archives joined to this message , the results of Matlab and Labview are different , so i think that the problem is with the conversions of the type inLabview from image to array and array to image where i lose information of the image.
have a nice day !!
thank you !!
Attachments:
matlab vs Labview results.zip ‏2487 KB

Question of button_click of ALV executes multiple times

Hi Experts,
I have a main screen 4000 including subscreen 2000 & 3000.
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sorry for my fault.
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Edited by: legend li on Aug 12, 2009 4:37 PM
Edited by: legend li on Aug 12, 2009 4:39 PM

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Hi,
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Matlab script of labview keeps executing multiple times,

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