creating arbitry signal

[DiPS]

in "SIMULATE ARBITARY SIGNAL>>define signal" is it possible only to enter data manually cell by cell, can't i put all cells from a spreadsheet(tab delimited txt) file

thanx

[DuffmanSays]

Unfortunately it is not possible to import the waveform data from an excel or text file in this section of the Simulate Arbitrary Signal express VI. The only file type supported for a save and load operation is the LabVIEW Measurement file (.lvm). What you may be interested in is that you can open an lvm file with a standard text editor. I'd suggest that you save one configuration from the express VI and add to this file the data that you'd like. Notice that the two columns will represent your x array and your y array. You can modify these columns and then re-import this data into the express VI.

To read directly from the text files themselves, you would need to bypass the express VI and use the File I/O VIs. With these you can read data from these text files and build the signal that you need manually. I hope this is useful for you!

Mike D.
National Instruments
Applications Engineer

[DFGray]

If you are interested, you can find the specification for the LVM format here.

[Sachindian]

Hello DuffmanSays

Sir, i am trying to do the same thing. Could you please elaborate on how to build the signal from the text data.

Regards

Sachin

[crossrulz]

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@Sachindian wrote:

@DuffmanSays

Sir, i am trying to do the same thing. Could you please elaborate on how to build the signal from the text data.

Regards

Sachin

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It kind of depends on your text file.  But what I've done in the past is read my csv file and parse it to get a 1D array.  I can then build a waveform using the array and choosing a sample rate.

[jto2]

If you have SignalExpress, you can use the Load from ASCII VI. Alternatively, you can do what crossrulz said by using Read from Spreadsheet File VI, which can read delimited data in .txt files as well.