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 Peak fitting with two different peak functions		  New Topic  Reply to Topic
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Sam Thompson

United Kingdom
2 Posts
Posted - 11/18/2024 :  5:41:11 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2021b 9.8.5.212
Operating System: Windows 10

Hello,

This seems like a very trivial question but I can't find any info anywhere.

I have a multimodal histogram. It appears to contain 1 lognormal distribution and 2 gaussian distributions. I've been using the "Multiple Peak Fit" but can't figure out how to use two different peak functions.

Using three lognormal profiles doesn't give me a desirable fit.

Thanks in advance :)

Sam

ChaoC

USA
174 Posts
Posted - 11/18/2024 :  5:57:41 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hello Sam,

The Peak Deconvolution app may be what you're looking for:
https://www.originlab.com/fileExchange/details.aspx?fid=453

You can fit each peak with a different function.

Best,
Chao
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Sam Thompson

United Kingdom
2 Posts
Posted - 11/18/2024 :  6:18:58 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi Chao,

That's just what I'm looking for.

Thanks very much,

Sam
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