[R-sig-eco] Help in code for fitting a growth model in R

I have to fit a model to growth data of Hevea (rubber) trees. The details are outlined in the attached docx file. Kind help is solicited. -- Dr. TR Chandrasekhar, M.Sc., M. Tech., Ph. D., Sr. Scientist Rubber Research Institute of India Hevea Breeding Sub Station Kadaba - 574 221 DK Dt.,

[R-sig-eco] Help in code for fitting a growth model in R

I have to fit a model to growth data of Hevea (rubber) trees. The details are outlined in the attached docx file. Kind help is solicited. -- Dr. TR Chandrasekhar, M.Sc., M. Tech., Ph. D., Sr. Scientist Rubber Research Institute of India Hevea Breeding Sub Station Kadaba - 574 221 DK Dt.,

[R-sig-eco] Help in code for fitting a growth model in R

Hi All, I have to fit the following model to growth data of Hevea (rubber) trees. [image: a = a - (a - b){e^{ - \,\,\frac{2}{T}(F(t) - F({t_0}))}}] where [image: F(t) = t + \frac{A}{{2\pi }}\sin 2\pi (t - {t_1})], [image: F({t_0}) = {t_0} + \frac{A}{{2\pi }}\sin 2\pi ({t_0} - {t_1})], and *t1*

[R-sig-eco] help with a suitable code to fit a complicated non-linear model in R

Dear All, I have to fit the following model to growth data of Hevea (rubber) trees: *a=a-(a-b)exp(-(2/p)(F(t)-F(t0))).* Where *F(t)=t+(A/2pi)(sin 2pi(t-t1))*, *F(t0)=t0+(A/2pi)(sin 2pi(t0-t1)), t1* signifies the maximum point of *f(t)*. Thus the equation becomes: