Re: [R] nls with some coefficients fixed

"Gabor Grothendieck" wrote in message news:aanlktilszaicycu3lz2f5d_bxq1g8m8f7jsjsbj2l...@mail.gmail.com... > On Tue, Jul 20, 2010 at 9:58 AM, wrote: >> For nls, the fixing (or masking) of parameters is not, to my knowledge, >> possible. >> >> This is something I've been trying to get in such r

Re: [R] nls with some coefficients fixed

"Gabor Grothendieck" wrote in message news:aanlktilszaicycu3lz2f5d_bxq1g8m8f7jsjsbj2l...@mail.gmail.com... > On Tue, Jul 20, 2010 at 9:58 AM, wrote: >> For nls, the fixing (or masking) of parameters is not, to my knowledge, >> possible. >> >> This is something I've been trying to get in such r

Re: [R] nls with some coefficients fixed

On Tue, Jul 20, 2010 at 9:58 AM, wrote: > For nls, the fixing (or masking) of parameters is not, to my knowledge, > possible. > > This is something I've been trying to get in such routines for over 2 > decades. Masks are > available, but not yet well documented, in Rcgmin and Rvmmin packages. > H

Re: [R] nls with some coefficients fixed

wrote in message news:33466.129.6.253.2.1279634282.squir...@webmail02.uottawa.ca... > For nls, the fixing (or masking) of parameters is not, to my knowledge, > possible. > > This is something I've been trying to get in such routines for over 2 > decades. Masks are > available, but not yet well do

[R] nls with some coefficients fixed

For nls, the fixing (or masking) of parameters is not, to my knowledge, possible. This is something I've been trying to get in such routines for over 2 decades. Masks are available, but not yet well documented, in Rcgmin and Rvmmin packages. However, these use an optim() style approach, which is q

[R] nls with some coefficients fixed

I'm using nls to fit a variety of different models. Here I use SSgompertz as an example. I want the ability to fix one (or more) of the coefficients that would normally be optimised (e.g. fix b3=0.8). Examples; based on and using data from example(SSgompertz) #- # vanilla ca