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Thread Subject:
Exponential curve fitting for mutiple curves

Subject: Exponential curve fitting for mutiple curves

From: Jing

Date: 10 Nov, 2010 21:54:04

Message: 1 of 4

Hi all,

I am trying to fit a matrix using exponential function: a+b*exp(-c*x) with the constant c.
Problem here is: I do not know c or a or b.
I need to fit all the multiple curves first to estimate c.
Please help and show me which function or code I should use.
Thank you!

S

Subject: Exponential curve fitting for mutiple curves

From: Marcus Schwenk

Date: 22 Nov, 2010 14:20:22

Message: 2 of 4

You can have a look at the example "fitcurvedemo" the fitting is done for a exponentail function of type A*exp(lambda * x), you will need to a a third parameter to the optimization.

Subject: Exponential curve fitting for mutiple curves

From: Miroslav Balda

Date: 22 Nov, 2010 17:45:06

Message: 3 of 4

"Jing " <jguo4@gsu.edu> wrote in message <ibf49s$gjt$1@fred.mathworks.com>...
> Hi all,
>
> I am trying to fit a matrix using exponential function: a+b*exp(-c*x) with the constant c.
> Problem here is: I do not know c or a or b.
> I need to fit all the multiple curves first to estimate c.
> Please help and show me which function or code I should use.
> Thank you!
>

Hi Jing,

Look at the FEX
     http://www.mathworks.com/matlabcentral/fileexchange/17534
where just your problem is solved.

Mira

Subject: Exponential curve fitting for mutiple curves

From: AyersElva19

Date: 30 Dec, 2010 13:09:26

Message: 4 of 4

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