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Multiple Y Axis without splitting

 
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JDT



Joined: 02 Mar 2016
Posts: 4

PostPosted: Tue Sep 13, 2016 12:54 pm    Post subject: Multiple Y Axis without splitting Reply with quote

Hello
I have a complex data series which is time dependent. Id like to show it all on a single chart with multiple axis, rather than splitting the Y axes as I think this makes it much easier to see events tied together in time. Is this possible. Im thinking something like having several Y axis out to the sides of the chart colour coded or similar.
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David
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Joined: 25 Nov 2006
Posts: 1940
Location: Chapel Hill, NC

PostPosted: Tue Sep 13, 2016 11:07 pm    Post subject: Reply with quote

Not exactly clear on the graph, but to get full flexibility with the axis, use the Extra Axis command. That allows you to position the axis on the side, change the color, space them out, use different units etc. You can even hide the default axis tick marks and let the Extra Axis handle all of the labels.

David
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JDT



Joined: 02 Mar 2016
Posts: 4

PostPosted: Wed Sep 14, 2016 1:20 pm    Post subject: Reply with quote

Hi David,

Thanks for getting back to me - that seems to almost do what I need it to, but is it possible to scale the displayed data against the separate axis?

For example I have two temperature/time series which can easily be displayed on the same graph, but then also a pressure/time series from the same experiment. Temp runs 0-1600 say, and pressure runs 0-40. Not too sure if it's possible but I'd like one series (temp) to use an axis that runs 0-1700 and the pressure series to be displayed against a second Y axis on the same graph that runs 0-50 so both series can be seen together. Does that make sense? And if so, is it possible?
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David
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Joined: 25 Nov 2006
Posts: 1940
Location: Chapel Hill, NC

PostPosted: Wed Sep 14, 2016 2:12 pm    Post subject: Reply with quote

You can overlap the axis by selecting "Join Y". By default the second axis will be displayed on the right hand side.

The Extra Axis can also handle scaling. And a lot of standard units are defined, so you can specify the data and axis units separately. There is even a Temperature conversion option.

David
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blakhani



Joined: 24 Sep 2012
Posts: 3

PostPosted: Tue Dec 13, 2016 3:49 pm    Post subject: Reply with quote

Just wanted to follow up on this. I think I am trying to do something similar, but I can't get the data in my second plot to scale to the new axis. It only scales to the original axis. I can change the range of values in my additional Y-axis, but how do I actually assign a plot to that axis?
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David
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Joined: 25 Nov 2006
Posts: 1940
Location: Chapel Hill, NC

PostPosted: Tue Dec 13, 2016 4:39 pm    Post subject: Reply with quote

In the top right corner of each command is a small selector to pick which axis the command belongs to. So on one of the commands the lower part should be dark, the other one the upper should be dark. Just click in the graph portion that you want.

David
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