Drag point to set curve limits in XY graph limit test

[avater]

There is an example "Limit Testing for Unevenly Sampled Data.vi",it shows how to set limits in XY graph.

Anyone knows how to Draw limits in the graph?Like drag /add /remove points in the graph.The limits will be applied instaniously.

This feature can be seen in may software applications,and it is really a cool way for users to set the limits.

A demo would be very appreciated.

Thanks,

[GerdW]

Hi avater,

- you can use mouse events of the graph to react on user actions

- you can show cursors in the graph and have the user play with them. You can read cursor positions with property nodes…

- you can react on cursor events too…

All you need to do is program the behaviour you want your VI to have!

A demo would be very appreciated.

LabVIEW comes with a lot of example VIs.

There are examples demostrating the usage of graph cursors…

[avater]

Thanks for your kind reply.

Actually I already studied the examples and also tried some ideas about it.But I haven't got a way to do that.

The problem is that when you play with a waveform that has thousands of points in the signal,your limits will be also converted to that amount of points.That is you are impossible to choose a point and drag in a curve consists of thousands of points.

[GerdW]

Hi avater,

you are impossible to choose a point and drag in a curve consists of thousands of points.

You may zoom in… 😄

The problem is that when you play with a waveform that has thousands of points in the signal

Well, that's you part as programmer…

You can limit the number of samples, you can zoom in, you can maybe use other limit "waveforms". It's up to you!