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maiducdai
Korea
4 Posts |
 Posted - 01/09/2013 : 04:27:29 AM
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Origin Ver.: OriginPro 8 SR0, v8.0724 (B724)
Operating System: Window xp 64
Hi all of you guy
Actually Im dealing with a plot that its data like following table
x-axis | y-axis
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2 | -0.03646
3 | -0.02416
4 | -0.01806
5 | -0.01442
6 | -0.012
7 | -0.01028
9 | -0.00799
12 | -0.00598
15 | -0.00478
20 | -0.00359
25 | -0.00287
30 | -0.00239
35 | -0.00205
40 | -0.00179
I want to use the logscale for y-axis, if anybody who know how to plot this curve in origin please help me to solve the problem.
your help will be highly appreciated
Thanks |
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Hideo Fujii
USA
1582 Posts |
Posted - 01/09/2013 : 09:29:17 AM
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Hi maiducdai,
How about simply taking the absolute values of Y's, i.e. plotting log(abs(y))?
--Hideo Fujii
OriginLab |
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maiducdai
Korea
4 Posts |
Posted - 01/09/2013 : 9:26:35 PM
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quote:
Originally posted by Hideo Fujii
Hi maiducdai,
How about simply taking the absolute values of Y's, i.e. plotting log(abs(y))?
--Hideo Fujii
OriginLab
Hi Hideo Fujii
first, thanks you so much for your reply. Actually I've tried that you are saying however the resultant plot seems to be different from what I expected. The following figures show how the difference look like.
negative logscale plotted using Matlab
Using origin (i.e. your above tip)
I highly appreciate your kindness reply
Dai, MaiDuc |
Edited by - maiducdai on 01/09/2013 9:40:19 PM |
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Kathy_Wang
China
159 Posts |
Posted - 01/09/2013 : 11:54:06 PM
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Hi,
The plot in Matlab has Y axis scale from 10^-1 to 10^-3, while in Origin it is reversed, i.e. from 10^-3 to 10^-1, so in order to get a same plot as in Matlab, you could change the Y axis scale to be from 10^-1 to 10^-3 in Origin.
Kathy
Originlab |
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maiducdai
Korea
4 Posts |
Posted - 01/10/2013 : 02:46:12 AM
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quote:
Originally posted by Kathy_Wang
Hi,
The plot in Matlab has Y axis scale from 10^-1 to 10^-3, while in Origin it is reversed, i.e. from 10^-3 to 10^-1, so in order to get a same plot as in Matlab, you could change the Y axis scale to be from 10^-1 to 10^-3 in Origin.
Kathy
Originlab
Thanks Kathy
Actually the Y-axis scale in Matlab plot is from -10^-1 to -10^-3, its not 10^-1 to 10^-3 like your understanding.!!!
And by the way, could you kindness help me to know how to reverse the y-axis scale ? Im using OriginPro 8 SR0, v8.0724 (B724) actually I could not find out the option in order to reverse axis scales so far.
I appreciate to your kindness reply
Dai, MaiDuc
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Kathy_Wang
China
159 Posts |
Posted - 01/10/2013 : 05:16:20 AM
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Sorry that I didn't notice the axis tick labels in the Matlab figure have a minus sign.
To reverse an axis in Origin, you could exchange the From and To value in the scale tab of the Axis dialog and in order to change the tick label to be minus values, you can then go to the Tick Labels tab of the Axis dialog and set Prefix as "-".
Hope this information helps!
Kathy
Originlab |
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maiducdai
Korea
4 Posts |
Posted - 01/10/2013 : 08:18:50 AM
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quote:
Originally posted by Kathy_Wang
Sorry that I didn't notice the axis tick labels in the Matlab figure have a minus sign.
To reverse an axis in Origin, you could exchange the From and To value in the scale tab of the Axis dialog and in order to change the tick label to be minus values, you can then go to the Tick Labels tab of the Axis dialog and set Prefix as "-".
Hope this information helps!
Kathy
Originlab
Thanks Kathy so much.
follow your advices, finally I have solved my problem.
I really appreciate your kindness help
Dai, MaiDuc |
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Topic |
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How to use the logscale for negative val (y-axis)?