subject:"\[R\] Deriving formula with deriv"

Re: [R] Deriving formula with deriv

2011-04-04 Thread David Winsemius

On Apr 4, 2011, at 6:35 AM, kitty wrote: Dear list, Hi, I am trying to get the second derivative of a logistic formula, in R summary the model is given as : ### $nls Nonlinear regression model model: data ~ logistic(time, A, mu, lambda, addpar) data: parent.frame() A mu lambda 0.

[R] Deriving formula with deriv

2011-04-04 Thread kitty

Dear list, Hi, I am trying to get the second derivative of a logistic formula, in R summary the model is given as : ### >$nls >Nonlinear regression model >model: data ~ logistic(time, A, mu, lambda, addpar) >data: parent.frame() > A mu lambda >0.53243 0.03741 6.94296 ### but I