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 slopes of log-log plots		  New Topic  Reply to Topic
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mlmayo

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Posted - 05/01/2009 :  6:38:15 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I've got some data and I've rescaled both axes of my plot to log10.

I want to find the slope on the log-log plot, however the data is linear. How can I find the slope of the log-log plot without manipulating the data itself (i.e. taking the log of each data point individually and plotting the result on a linear scale)?

Shirley_GZ

China
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Posted - 05/04/2009 :  01:45:20 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi mimayo,

I suppose that you had set the axis scale to log10 and want to get the apparent slope. In this case, you can use the Appaent Fit in the Linear Fitdialog.

http://originlab.com/www/helponline/Origin8/en/Regression_and_Curve_Fitting/Simple_Linear_Regression_Dialog.htm#Fit_Options

Any problem, please feel free to contact with us.

Shirley
OriginLab Technical Service Team
Edited by - Shirley_GZ on 05/04/2009 01:46:39 AM
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mlmayo

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Posted - 05/04/2009 :  09:41:28 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Thanks! This information is not obvious in the help manual.
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