LabVIEW
set chart value (property node) from a waveform ARRAY?!?
Hello,
I was able to use the property node to set both plots without trouble - could you tell me in what way it fails for you? The screenshot you posted shows no broken wires, so it looks like yours should run. If the behavior you see is that the chart looks like it is only displaying the first plot, this is because the data points for the two plots are exactly the same, overlaid on top of each other, preventing the second plot from being seen. You can resize the plot legend to show as many plots as you like, but the legend won't automatically resize (you can do this programmatically via another property node as well).
Here's a slightly modified version of the code that illustrates the point by generating two sets of random noise rather than one. Let me know if you run into any troubles!
I was able to use the property node to set both plots without trouble - could you tell me in what way it fails for you? The screenshot you posted shows no broken wires, so it looks like yours should run. If the behavior you see is that the chart looks like it is only displaying the first plot, this is because the data points for the two plots are exactly the same, overlaid on top of each other, preventing the second plot from being seen. You can resize the plot legend to show as many plots as you like, but the legend won't automatically resize (you can do this programmatically via another property node as well).
Here's a slightly modified version of the code that illustrates the point by generating two sets of random noise rather than one. Let me know if you run into any troubles!
Message Edited by MattP on 04-05-2007 10:34 AM
Message Edited by MattP on 04-05-2007 10:35 AM
The reason I was showing this with only one graph was that
the
two-graph version failed for me. I had tried having separate data
sources, of course. Just to be sure I have rebuilt the VI from scratch
as per your diagram (see attached image and VI) and run it again with
the same results:
The failure was not in my inability to see the plot but rather in an error message (attachment) which would only occur if I tried to wire more than a single plot into the value node.
I subsequently also tried doing this using 1D and 2D DBL arrays and observed a similar problem: the 1D case works fine, the 2D case throws "insane object" errors and crashes labview entirely.
The failure was not in my inability to see the plot but rather in an error message (attachment) which would only occur if I tried to wire more than a single plot into the value node.
I subsequently also tried doing this using 1D and 2D DBL arrays and observed a similar problem: the 1D case works fine, the 2D case throws "insane object" errors and crashes labview entirely.
Message Edited by frumpel on 04-05-2007 10:53 AM
