Hello,
I am using survreg for a simulation where data is randomly generated from a
Weibull distribution and the model parameters estimated. When this is
embedded within a loop and the process repeated for different datasets, the
program aborts after a few runs in most cases giving the following
Hello
I am fitting a Cox PH model using the function coxph(). Does anyone know how
to obtain the estimate of the covariance matrix under the null hypothesis.
The function coxph.detail() does not seem to be useful for this purpose.
Thanks,
KD.
[[alternative HTML version deleted]]
Hello!
When I use the functions rma() or justrma() in the Bioconductor affy
package, the standard errors for the expression estimates computed by the
function se.exprs() is a matrix of NA's. I am wondering if any of you have
encountered this problem and if there is a solution. Any help would be
