Put a signal from labview into .mat file

[Escape]

Hi,

I have this block diagram that I took from a discussion about sEMG signal but I need to put the simulated signal or spectrum function into .mat file to open it in Matlab.

What software do I need ? 

I've Labview 2010 but I don't know how take the output signal to save 

I've red something about Matlab dataplugin and I've downloaded it, but in system requirements there are other applications (like  DIAdem Development System 10.2, NI DataFinder Server Edition 2.1, LabVIEW DataFinder Toolkit 2009 )

Thanks

[AntonisV]

Hello escape, 

I think that the following link will help you a lot. It also contains an example.vi that will help you save your output signal in a mat file. Just take the desired signal and put it as an input in the Write Data Channel. This will do the work.

http://digital.ni.com/public.nsf/allkb/FBA2EAE2AB27BDEA862575D900724BDD?OpenDocument

[Escape]

Thanks Antonios for reply,

I've tried to run LabVIEW Write To MAT LV86.vi  but it returns me this error:

LabVIEW:  The object refnum is invalid. The node that returned this refnum might have encountered an error and did not return a valid refnum. The storage this refnum refers to might have closed before the call executed.

[AntonisV]

An even simpler way is to follow the instructions of this article.

http://digital.ni.com/public.nsf/allkb/2F8ED0F588E06BE1862565A90066E9BA?OpenDocument

You can save the data of your signal in ASCII format in LabVIEW using the Write To Spreadsheet File VI on the Programming»File I/O palette and then you can open this file in Matlab environment by typing

>>LOAD filename

In this way you will be able to read your Data in Matlab.

In the link above you can find also instructions on how to interact between Labview and Matlab environment.