Re: [R] non linear estimation

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 -- View this message in con

Re: [R] non linear estimation

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 -- View this message in context: http://r.789695.n4.nabble.com/non-linear-estimation-tp2072136p2075338.html Sent from the R help mail

Re: [R] non linear estimation

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 -- View this message in context: http://r.789695.n4.nabble.com/non-linear-estimation-tp2072136p2074911.html Sent from the R help mailing list archive at Nabbl

[R] non linear estimation

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 a>10, a+b<19,b<3, d>0 and the startin