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doctsh
Australia
3 Posts |
 Posted - 10/24/2015 : 12:09:06 PM
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I am trying to plot log scale that include negative scales, like 10^1, 10^2,10^3....-10^1,-10^2,-10^3...
I think this plot is called log-modulus transformation.
Anyone please advise me how to do this in Origin?
Thanks
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Edited by - doctsh on 10/25/2015 2:20:47 PM |
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jasonzhao
China
262 Posts |
Posted - 10/25/2015 : 10:44:58 PM
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Hello,
We may need to plot this image into a double layer graph. Would you please share your data file with us for a further check?
Best regards!
Jason
OriginLab Technical Service |
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doctsh
Australia
3 Posts |
Posted - 10/25/2015 : 10:58:12 PM
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quote:
Originally posted by jasonzhao
Hello,
We may need to plot this image into a double layer graph. Would you please share your data file with us for a further check?
Best regards!
Jason
OriginLab Technical Service
Thanks for coming forward to help
Please find enclosed the raw data (x,y) which has to be plotted as in the above sample.
Regards
http://www.originlab.com/ftp/forum_and_kbase/Images/data_2.xlsx |
Edited by - doctsh on 10/25/2015 11:24:16 PM |
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jasonzhao
China
262 Posts |
Posted - 10/26/2015 : 06:30:53 AM
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Hello,
Please check with this graph created with your data:
This is a double layer graph, we need to separate the Data in Y<0 into another column by using the syntax:
(wcol(2)>=0)?wcol(2):--
in Set Values dialog, then multiply the new column by -1.
After this, we create a 2 layer graph vertical aligned , and reverse the second Y axis to create 2 opposite Log Y axis.
You can contact tech@originlab.com for further information.
Best regards!
Jason
OriginLab Technical Service |
Edited by - jasonzhao on 10/26/2015 06:31:41 AM |
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Hideo Fujii
USA
1582 Posts |
Posted - 01/29/2016 : 09:39:08 AM
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Hi doctsh and other visitors to this post,
Regarding to plot the data which contains negative values in log scale, the following blog has
been published with the templates.
http://blog.originlab.com/graphing/visualizing-the-negative-log
Below is a sample result from your data (in a single layer) using this template:
I hope this is helpful.
--Hideo Fujii
OriginLab |
Edited by - Hideo Fujii on 01/29/2016 09:48:33 AM |
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Topic |
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log -modulus scale