Two signals at two waveform graphs

[Jurij]

Hello Everyone! 

I got some problems with my software for data acquisition. 

I got two signals and I have to show two signals at two different Waveform Graph. 

How to seperate signals?

[Dennis_Knutson]

Index Array.

[Jurij]

Where I have to put Index Array?

I can't find examples for using index array to waveform graphs

[Dennis_Knutson]

You index the 2D array that is coming out from the DAQmx Read.

It is irrelevant whether there is a specific example for a DAQmx Read. A 2D DBL array is always a 2D DBL array whether it is wired to a graph or something else. You need to read the help for the DAQmx Read in order to know whether to read rows or columns.

[Jurij]

I read DAQmx help and what I know is that Each row corresponds to a channel in the task. Each column corresponds to a sample from each channel.

I really don't know how to wire Index Array... Can you explain it to me, please?

Look at the attachment, is it ok?

[Dennis_Knutson · Accepted solution]

There is an input called 'array'. Simply wire this to the 2D DBL array. Drag the bottom of the Index Array down so that you have a second subarray output. Wire up your graphs. Done. No need to wire anything to the index inputs.

[Jurij]

Thank you very much

[Jurij]

I got question for you - why I don't need to wire anything to index inputs?

[Dennis_Knutson]

The first index input defaults to 0. Each time you drag it down, the index input is automatically set to n+1. You can also start at an index other that 0. For example, you wanted rows 2,3,4,5, you would wire 2 into the first index input and after dragging it down to get an additional 3 inputs, you would skip wiring the values 3,4, and 5.

[Jurij]

Thanks, now I get it