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Keq
Germany
4 Posts |
 Posted - 06/01/2015 : 5:22:09 PM
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hey guys, got a litle problem.
I have some messured date and wanna plot them. I got temperature and
pressure messurements but i have so plot ln(p) over 1/T.
Possibility 1: transform all data with my calculator and plot them
Possibility 2: plot them , ad transform the axes (one in logarythm,the oter one in reciproc (doenst work)
can someone tell me how to do this exactly?? somehow i cant adjust the value area on the axes(ln values are from -3 to 0, but if i tip in from -3 to 0 he just writes somthing like .. 10^-11) and if i wanna draw a fitline he somehow draws the fitline to the not transformed data points(he fits some e-funktion into linear data points, cause the not transformed data points are e-funktion like...) the fitline doesnt seem to respect the logarythm/reciproc axis
I would appreciate some held very much, thx :)
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Shirley_GZ
China
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Posted - 06/02/2015 : 05:21:02 AM
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Hi Keq,
You said you couldn’t adjust the value area on axes, this is because ln(x) should always be greater than 0, Origin doesn’t support to set the From and To values to a negative values or 0(ORG-7470).
For the problem about fitline, in linear fit, there is an option “Apparent Fit”, you can turn on or turn off this option to see if the result is what you want?
http://www.originlab.com/doc/Origin-Help/LR-Dialog#Fit_Options
http://www.originlab.com/doc/Quick-Help/Apparent-Fit
If this is not what you want, please send us the sample data(via:tech@originlab.com) and tell us your detailed requires.
Originlab Technical Service Team |
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Data value area when axis chnged from linear to ln