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Strio

4 Posts
Posted - 11/13/2019 :  2:25:39 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Hi,
I have been plotting X1 vs Y where X1 is equal to 1000/T (°C-1). I also successfully managed to have the top axis (X2) in °C by simply adding a second axis and "link axis scale" of X2 to the bottom one (X1). In the "link axis scale" panel I set X1=1000/x1 and X2=1000/x2. I finally set the "scale type" of the bottom axis as "inverse". So far so good. The big problem came with a new plot where the bottom axis is 1000/T (K-1). Here, I need still the top axis in °C. So the equation to transform is (1000/x)-273.15. Unfortunately, the new axis is not entirely correct. The first and last values are ok but not in between because (?) the "scale type" is not properly "inverse". I tried to see if I can do something with the option "custom formula" but I got really lost.... Many thanks.

yuki_wu

896 Posts
Posted - 11/14/2019 :  04:51:58 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

I am sorry that I might not understand your question fully, but I think you can edit the axis label via Axis dialog:

1. Double-click on X-axis and then go to Tick Labels tab and Display subtab
2. Type “1000/x” in Formula box
3. Select Top in the left panel, go to Tick Labels tab and check Show checkbox
4. Go to Display subtab and type “(1000/x)-273.15” in Formula box
5. Click OK button

Hope it can be some help.

Regards, Yuki

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cpyang

USA
1406 Posts
Posted - 11/15/2019 :  04:37:59 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Can you check if this blog works for you?

http://blog.originlab.com/graphing/display-celsius-as-top-axis-in-arrhenius-plot

CP
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Strio

4 Posts
Posted - 11/17/2019 :  04:38:05 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,
I solved with using "offset reciprocal option" instead of "reciprical". yuki_wu, your suggestion works too.

Many thanks.
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