Select a set of points in a xy graph

[M.H.K]

Hi

I have a xy graph contains a number of points and I want to select a part of them similar to ROI and their colors be changed and also, we can select a number of ROI in that.

please help me.

[MikaelH]

To be able to do this, you need to have every point as a one plot, and then you can use the PlotImage.Front property node to follow the mouse to draw a ROI on the graph, and then find the plots-points that are within the ROI and change the Color of those plots.

It might be easier to use a Picture Control Plot to start with.

[M.H.K]

8 hours ago, MikaelH said:

To be able to do this, you need to have every point as a one plot, and then you can use the PlotImage.Front property node to follow the mouse to draw a ROI on the graph, and then find the plots-points that are within the ROI and change the Color of those plots.

It might be easier to use a Picture Control Plot to start with.

Hi MikaeIH and thanks for your reply.

I have a question about your help.

How Can I draw a ROI in xy graph?

[MikaelH]

Use the property node called: PlotImage.Front, this value accepts Picture control data.

 

[MikaelH]

I've created an example for you.

XY-GraphSelection.vi

[M.H.K]

On 9/27/2016 at 2:22 AM, MikaelH said:

I've created an example for you.

XY-GraphSelection.vi

Hi MikaeIH and thank you very much.It's exactly my goal.

I will try your example and if I have a question, I will say you.

Thank you again.

[MikaelH]

12 hours ago, M.H.K said:

Hi MikaeIH and thank you very much.It's exactly my goal.

I will try your example and if I have a question, I will say you.

Thank you again.

No Worries, that's why we are here :-)
The property node that will let you know the Coordinate Offset is a property node that is "Secret", you can only select this if you put this into your LabVIEW.ini file.
SuperSecretPrivateSpecialStuff=True

If you don't want you use this property node, you can just use a constant value.