timestamp

[adwhit]

In labview 8.5, how can I plot a discrete signal, i.e. not a waveform, vs. a timestamp?  I am trying to take a waveform then average it and plot the averaged values over time.

Thanks!

[Dennis_Knutson · Accepted solution]

Convert the timestamp to a DBL and use it as the X axis of an XY graph.

Message Edited by Dennis Knutson on 03-18-2010 01:54 PM

[GerdW]

Hi adwhit,

take a XY graph. Make an array of timestamps for the X values. Make an array of numbers for the Y values. Bundle the arrays to a cluster. Wire the cluster to the graph. That's what the context help of the graph says! Now the only step left is to format the x axis to show time instead of numerics...

[Dennis_Knutson]

Gerd,

We have to stop meeting like this.

[adwhit]

Thanks for the help, the graphical solution was very helpful!

I now want to take a running derivative, or linear fit to determine equilibrium... any ideas on that?  I'm just not sure how to do the running part the best way.  I need to take probably the last 1200 samples once I have that many, or all the samples before I reach 1200.

Thanks again.

Adam 

[GerdW]

Hi adwhit,

just search the forum for "running average" or "running mean" - you will find a lot of threads already with solutions...

[adwhit]

Ok, thanks a bunch.