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goldfronts1

4 Posts
Posted - 03/09/2012 :  2:19:54 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System: Win 7

Origin Lab 8

I am trying to integrate some data but the integral keeps becoming negative. I wanted to know how to fix this.

Thanks

Hideo Fujii

USA
1582 Posts
Posted - 03/09/2012 :  2:58:45 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi goldfronts1,

Probably your data is under Y=0 line, and you the option of "Area Type" in Integration tool ("Integ1") was set to "Mathematical Area". In this option setting, the area under Y=0 is calculated as negative in the sense of mathematical integral. If you change this option to "Absolute Area", Origin calculate the area positive either the data is above or under Y=0; though I'm not sure if this is what you are trying to obtain.

Can you check your data, the above option, and what you want to obtain really?

--Hideo Fujii
OriginLab
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