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 a tricky fitting task

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T O P I C    R E V I E W
StevoSn Posted - 05/02/2009 : 12:59:22 PM
Hello!
I want to fit data to a function with two intervals but identical parameters. How can I do that, without fixing the parameter values in the second interval?

let's say for example

y = P1 + P2*x ; for 0 < x < x1 and
Y = P1 * exp(P2*x) ; for x < x1

1. how can I define a function like this?
2. how can I get origin to fit on this function?

Thanks a lot!
Cheers
Stevo
1   L A T E S T    R E P L I E S    (Newest First)
Deanna Posted - 05/04/2009 : 01:39:40 AM
Hi, please see the answer to a similar question answered before:
http://www.originlab.com/forum/topic.asp?TOPIC_ID=4684



Deanna
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