Re: [R] need help in using Hessian matrix

2009-11-03 Thread Uwe Ligges


Laila Alkhalfan wrote:

Hi
I need to find the Hessian matrix for a complicated function from a certain
kind of data but i keep getting this error
Error in f1 - f2 : non-numeric argument to binary operator

the data is given by

  U<-runif(n)
  Us<-sort(U)
  tau1<- 2
  F1tau<- pgamma((tau1/theta1),shape,1)
  N1<-sum(Us


Is there a particular reason why you need the hessian?

PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, *reproducible* code.

Please make your function more readable.
We are happy to help, but that means you need to make your code readable 
and reproducible by giving some corresponding data.


Best wishes,
Uwe Ligges






Thank you and take care.
Laila

[[alternative HTML version deleted]]

__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.


[R] need help in using Hessian matrix

2009-11-02 Thread Laila Alkhalfan
Hi
I need to find the Hessian matrix for a complicated function from a certain
kind of data but i keep getting this error
Error in f1 - f2 : non-numeric argument to binary operator

the data is given by

  U<-runif(n)
  Us<-sort(U)
  tau1<- 2
  F1tau<- pgamma((tau1/theta1),shape,1)
  N1<-sum(Ushttps://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.