8 replies to this topic

[Ano Ano]

Hello,

I am aquiring data from 8 channels (4 devices) so in order to plot them I added a build array (see attached picture) and created a 2d array. If one or more devices are switched off or disconnected this will create an array full of zeros (column H).

How can I avoid this?

Attached Thumbnails

• 

[Antoine Châlons]

Quick answer could be something like this :



But maybe you could change your whole application to only acquire the data you're going to plot.
Can you show how you setup your data acquisition?

Hope this helps

[asbo]

Don't turn the device off? You should describe what your ideal outcome is. What you probably should do is conditionally disable plots on your graph.

[Ton Plomp]

I would use an array of waveforms instead of a 2D array, using an array of waveforms you can have an empty waveform.

Ton

[JamesMc86]

Ton's solution should work well. What this comes down to is needing an array of arrays. By luck Darren Natinger posted a nugget on this today (which is essentially the same as Ton's solution): http://forums.ni.com...012/m-p/1984521

[Stagg54]

My suggestion is similar to Tons. I just use an array of cluster, where each cluster contains just an array.

[Stagg54]

I should have read Darren's article first, because that is exactly what he suggested.

[Ano Ano]

Thank you all for your replies,

Ton's idea works but I notice a "display delay" when the waveform array data appear on the chart. When the 2d array is connected to the chart the data appear to move faster.

Darren's article is very interesting, how do I plot an array of clasturs of arrays into a chart?

Antoine's idea creates zero columns like 1 & 2 where as I would like to create columns like 3 & 4:

[Prabhakant Patil]

Check attached file.
I have generated data and also removed zero from the data.

Attached Files

•  Remove Zero.vi   17.44K   26 downloads