graph with 2 y scales

[nikosfs]

Hello, I am using the Labview 8.2.1 and I would like to ask for a solution.

I use a Waveform Graph with 1 x-scale and 2 y-scales. The one y-scale is left and the other is on the right side of the graph.

I have created 2 plots and I have assigned them to the corresponding scales.

I want to plot 2 x-y arrays one after the other with different y-scales. Specifically, there must be one plot that ends at a value of the x-axis and from that point the other plot must continue using the other y-scale.

To do this I tried a "Sequence Structure", in the first frame of which, I create the first plot using 3 "Property Nodes": Plot.YScaleIndex , ActivePlot & ActiveYScale and I give the zero value to them in order to use the first y-scale.

In the second frame I create the second plot giving the integer 1 to the aforesaid "Property Nodes", but the first plot vanishes and the second plot does not use the second y-scale but the first one.

This is the frame1:

This is the frame2:

What can I do?

Thank you in advance.

[TCPlomp · Accepted solution]

What happens in your sequence structure is that the second  fame overwrites the data from the first case.

You should create your two data-sets, and build an array of those, feed this into a for loop and then per data set, select the proper:

-plot (ActPlot)

-Y-scale (Plot.ScaleIdx)

-Y-scale to edit (ActYscl)

Then set the max and min, be aware that the second Y-scale should be created before running this code.

Another option would be to just auto-scale the Y-scales.

Ton

[nikosfs]

Thank you very much.

It works!

[qing_shan61]

Would it be even better, if on the Graph Properties page, Plot tag, one can set up the Y-scale to left or right? Good idea? But I do not know how to make recommendations to NI.

[Allison_M]

Hi qing_shan61,

I encourage you to post your product suggestions on the LabVIEW Idea Exchange found here: http://forums.ni.com/t5/ideas/v2/ideaexchangepage/blog-id/labviewideas

Regards,

[qing_shan61]

Thank you Allison M, look:

http://forums.ni.com/t5/LabVIEW-Idea-Exchange/idb-p/labviewideas/tab/most-recent

Pease go in and give a Kudos!