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 Subtracting a peak from a curve with different x		  New Topic  Reply to Topic
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itrarti

France
1 Posts
Posted - 11/22/2017 :  11:55:12 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I have to remove a specific peak from a series of photoluminescence spectra since it "superposes" to the tail of a second more important peak. This unwanted peak (laser) has the same intensity and position for all spectra, so I performed a multi-peak fit on one spectra, and now as output I have the curve I shoud subtract for each spectra. Fine.

The problem is: the x axis steps are different between measured spectra and laser "fit" curve, so that if I simply subtract the two y columns, the laser peak is subtracted at the wrong x position.
Is there a way to "contract" coherently the number of x and y points of the "fit" curve to match the ones of my spectra?

I am thinking about a solution since a while with no success
I hope you can help me!

yuki_wu

896 Posts
Posted - 11/23/2017 :  02:23:32 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

Do you want to perform subtraction on two curves? If yes, I think you can try Simple Curve Math by selecting Analysis: Mathematics: Simple Curve Math from the menu. More info please refer to this page:
https://www.originlab.com/doc/Origin-Help/Math-SimpleColumnCurveMath

Regards,
Yuki
OriginLab
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