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Y as a matrix in nlinfit
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| mishra 2005-12-18, 7:06 pm |
| Hi all,
I have trouble using nlinfit . In nlinfit if the Y is a vector then it
works properly, but when I feed in Y as a matrix (say 3 coulmns) then
it is showing an error
"??? Error using ==> nlinfit Requires a vector second input argument."
I wanted Y to be a matrix. As I have 3 different observed
values(replicates) in 3 coulmns and I want that nlinfit should estimate
the parameter based on the predicted value from the model function and
the observed values form Y. Can it be done. If so how, otherwise is
there any other toolbox for nonlinear curve fitting and parameter
estimation which can accept Y as a matrix.
Thnaks,
Mishra.
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| John D'Errico 2005-12-18, 7:06 pm |
| In article <1134930611.269589.179270@g14g2000cwa.googlegroups.com>, "mishra" <mishradh@gmail.com> wrote:
> I have trouble using nlinfit . In nlinfit if the Y is a vector then it
> works properly, but when I feed in Y as a matrix (say 3 coulmns) then
> it is showing an error
>
> "??? Error using ==> nlinfit Requires a vector second input argument."
>
> I wanted Y to be a matrix. As I have 3 different observed
> values(replicates) in 3 coulmns and I want that nlinfit should estimate
> the parameter based on the predicted value from the model function and
> the observed values form Y. Can it be done. If so how, otherwise is
> there any other toolbox for nonlinear curve fitting and parameter
> estimation which can accept Y as a matrix.
So either average your replicates, or reshape it into a problem
with 3*n data points. WTP?
HTH,
John D'Errico
--
The best material model of a cat is another, or preferably the same, cat.
A. Rosenblueth, Philosophy of Science, 1945
Those who can't laugh at themselves leave the job to others.
Anonymous
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