Re: [R] Calculation of standard error for a function

2012-03-03 Thread Rubén Roa
deltamethod function in package msm may help (but bear in mind the warnings/admonitions/recommendations of other helpers) HTH Rubén -- Rubén H. Roa-Ureta, Ph. D. AZTI Tecnalia, Txatxarramendi Ugartea z/g, Sukarrieta, Bizkaia, SPAIN -Original Message- From: r-help-boun...@r-project.or

Re: [R] Calculation of standard error for a function

2012-03-02 Thread Rolf Turner
On 03/03/12 13:35, David Winsemius wrote: On Mar 2, 2012, at 7:05 PM, Duncan Murdoch wrote: On 12-03-02 4:47 PM, Jun Shen wrote: Dear list, If I know the standard error for k1 and k2, is there anything I can call in R to calculate the standard error of k1/k2? Thanks. No, because it depen

Re: [R] Calculation of standard error for a function

2012-03-02 Thread David Winsemius
On Mar 2, 2012, at 7:05 PM, Duncan Murdoch wrote: On 12-03-02 4:47 PM, Jun Shen wrote: Dear list, If I know the standard error for k1 and k2, is there anything I can call in R to calculate the standard error of k1/k2? Thanks. No, because it depends on the joint distribution of k1 and k2.

Re: [R] Calculation of standard error for a function

2012-03-02 Thread Duncan Murdoch
On 12-03-02 4:47 PM, Jun Shen wrote: Dear list, If I know the standard error for k1 and k2, is there anything I can call in R to calculate the standard error of k1/k2? Thanks. No, because it depends on the joint distribution of k1 and k2. Even if you knew they were independent, that would no

Re: [R] Calculation of standard error for a function

2012-03-02 Thread David Winsemius
On Mar 2, 2012, at 4:47 PM, Jun Shen wrote: Dear list, If I know the standard error for k1 and k2, is there anything I can call in R to calculate the standard error of k1/k2? Thanks. This does not appear to be a well-posed question yet, and it is arguably more a statistics question than