On Thu, 9 Jun 2005, Watalu, Y. (aka Wataru) wrote:
Hi,
I'm also wondering which expression the survreg() uses
for Weibull regression. Referring to help(survreg) and
help(survreg.distributions), I guess survreg() fits the
following model.
survreg() uses a different parametrization, say
F(x,
On Wed, Jun 08, 2005 at 08:39:21PM -0400, [EMAIL PROTECTED] wrote:
> I was wondering if someone familiar
> with survival analysis can help me with
> the following.
> I would like to fit a Weibull curve,
> that may be dependent on a covariate,
> my dataframe "labdata" that has the
> fields "cov
Hi,
I'm also wondering which expression the survreg() uses
for Weibull regression. Referring to help(survreg) and
help(survreg.distributions), I guess survreg() fits the
following model.
survreg() uses a different parametrization, say
F(x, Wshape, Wscale) = 1-exp(-Wscale*(x^Wshape))),
and fit
I was wondering if someone familiar
with survival analysis can help me with
the following.
I would like to fit a Weibull curve,
that may be dependent on a covariate,
my dataframe "labdata" that has the
fields "cov", "time", and "censor". Do
I do the following?
wieb<-survreg(Surv(labdata$time
