setting waveform chart range

[floydyourself]

I am using a waveform chart to plot current consumption from a power supply. This data is also included in a table that is exported as an excel file. There are only certain regions of the graph that contain important data after each trial.  Is there a way that I can set vertical bounds after a trial consequently selecting only of certain range of obtained data in my chart?

In other words, I basically need to highlight a region of the graph and have the corresponding data points in the table selected so that I only analyze those.

Attached is my current project. 

[vt92]

You can manually change the X scale of the graph to just show the data of interest:

.. or you could use two vertical cursors to hightlight your area of interest.

[floydyourself]

pardon my ignorance, but how do it do that?

[vt92]

Right click on the graph and create a property node.  I created two controls to set the min/max, but it might be better to do it programmatically.

[floydyourself]

Cool. And how do I use the cursors to do that?

[floydyourself]

I figured out how to use the cursors but for some reason I can't use graphs with this instrument I/O assistant, only charts.  And cursors only work for graphs.  Also, I added the property node and connected it to the error out but nothing happens differently when I run it. Not sure what to do.

[vt92]

Charts accept only scalar values.  Graphs accept arrays, waveforms, etc.

One more thing:  you also need to set the XScale.ScaleFit = 0 to turn off autoscale. 

 

Post your updated code to the forum so we can take a look at it.

[floydyourself]

Beyond this point, I'm not really sure what to do.

[vt92]

All you need to do is right-click on the property node and select "change all to write".  Then wire up the correct values.  I don't know what your program is doing, so I don't know the logic to decide what the min/max should be.

[floydyourself]

The way it works is, I run the program, and obtain data for the whole test.  Only a certain range of that data is statistically significant.  I need to mark off that range after I have obtained the data from the test.  Obviously, the range is different for every test, but I know how to identify it based on the waveform.