Dear R experts---
I doubt that someone has already solved my problem, but I thought I
would ask quickly, just in case someone has.
Let' say I start with a (flattened panel) model that says
y[i] = x[i] + b*(T-x[i])
easy enough---this is just a linear model. I could also make this a
Hi
I put a search question about nonlinear programming in R site search and
got many answers maybe you could find something which suits your needs.
Maybe you could also look at CRAN task view - Optimisation and
Mathematical programming
Regards
Petr
r-help-boun...@r-project.org napsal dne
-Mensaje original-
De: r-help-boun...@r-project.org
[mailto:r-help-boun...@r-project.org] En nombre de JamesHuang
Enviado el: jueves, 29 de abril de 2010 3:38
Para: r-help@r-project.org
Asunto: Re: [R] non linear estimation
any suggestion? actually I just wanna know
hey,
thanks and I actually ready found such packages such as nlme, but i failed
to found the comment for restrictions, so.anyway, thanks fro your help.
James
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it is an assignment, haha~~
I just simplify the question and i could do that in Excel using solver. I
just wonder whether I can find a way to do that in R. The main problem is
adding restrictions, I managed to do one question without restrictions in R
by nls.
James
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hey guys,
I got a problem when I tried to estimate parameters in a non linear function
with restrictions. The function is: Y=a+(b+c*x)*exp(-d*x), given values of x
and y. The least squares method is required and there are many restriction
on a,b,c,d, such as a10, a+b19,b3, d0 and the starting
any suggestion? actually I just wanna know if there is a package for non
linear estimation with restriction, thanks. I am a new for R
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