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 Fitting multiple data sets with a Lorentz Curve

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T O P I C    R E V I E W
shah109 Posted - 08/15/2013 : 12:28:23 PM
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 8.6.0 (64 bit) - b70 Academic
Operating System: Windows 8

I have upwards to 40 sets of data with the same x values but different y values set up such that the first column is x and the following 40 are y values. I need to fit a separate Lorentz curve for each set of y values and then record the parameters such as peak and FWHM.

I was hoping for a faster way of collecting this data besides individually analyzing each x,y combination.

Thank You!

Also, I am new to Origin and have only used it sparingly.
2   L A T E S T    R E P L I E S    (Newest First)
shah109 Posted - 08/16/2013 : 3:23:51 PM
Thank You! That was very quick and it worked great!
Hideo Fujii Posted - 08/15/2013 : 2:46:59 PM
Hi,

You can simply highlight all columns (CTRL-A), start non-linear curve fitter (CTRL-Y), choose Lorentz in Origin Basic functions, and press Fit button. The peak (=(xc, yc)) and FWHM (=w) should be in the report sheet in the same workbook. (This way runs the NLFit in Multi-Data Fit Mpde to perform the Independent Fit.)

This may be the quickest way.

--Hideo Fujii
OriginLab

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