extract portion of signal, using a cursor

[daleellilla]

Good Day

Im writing a VI, to measure some forces, and i need to find the averages of the graphs at certain points,

therefore id like to be able to extract a portion of the signal, using a cursor and manually select the portion of the graph that I would

like to analyze.

Is this possible to do in labview?

and whats the simplest way of doing this.

Thanks in Advanced

Daleel

Super Noob

[Coq_Rouge]

This is the basic idea. Copy the principals, because my example is quick and dirty 😉

[smercurio_fc]

Note: The VI provided is written in 7.0. If you open it in 8.x the property node will say "OldCursList". This is a "special" property that was created so that 7.x code would not break when opened in 8.x. If you have 8.x you should change the property node to select "Cursor List", since "OldCursList" is not selectable.

[daleellilla]

thakyou

ill check it out

Daleel 

[GMik]

I am trying to do the same thing except I am reading in a signal using the DAQ assistant tool containing 4 channels.  I'd like to select a section of the graph and get the average signal for all 4 channels in that selected region.  How do I do that?  I'm fairly new to Labview.  I had trouble applying your vi to signals (as opposed to a waveform) and more trouble trying to apply it to the 4 channels at once.

Any help is much appreciated.

Thanks,

George

[vernyew.lim]

Hi George,

What do you mean when you say you have trouble with it? What problem exactly did you face? Did you get an error?

To better assist you, we would need to know what you did. Perhaps if you uploaded your VI we could help you troubleshoot it.

[GMik]

I was trying to read in the 4 channels from an LVM and be able to select a section of the signal with the cursor and get the average of signal for each channel in that region.  for some reason I couldn't get the vi attached above to work reading from a file like the one attached.

[vernyew.lim]

Hi George,

Thanks for the LVM file, but that does not explain to me how you tried to do the actual selecting of the section of the signal that you want. Clearly you could not just use the example posted earlier without any changes whatsoever, so I'd like to know what you tried to do. Otherwise it would be pretty hard to help you to troubleshoot your issue.

Please upload the VI, or at least the screenshot. That would be the only way we can get a good enough understanding of your problem to be able to help you solve it.