I forgot to mention, the Design package is deprecated (which suggest
your version of R is rather dated, current is 2.15). The rms package
replaces Design.
On Thu, May 10, 2012 at 10:23 PM, Joshua Wiley wrote:
> Hi Grace,
>
> I seem to have sent an empty draft before. Anyway, something like
> th
Hi Grace,
I seem to have sent an empty draft before. Anyway, something like
this might be an approach (untested):
require(rms)
set.seed(10)
dat <- data.frame(
age = rnorm(500, 40, 10),
race = factor(sample.int(2,500,TRUE), labels = c("a", "b")))
X <- model.matrix(~ age + race, data = dat)
b
On Thu, May 10, 2012 at 7:41 PM, Grace Ma wrote:
> Hi,
> I am trying to simulate a regression on survival data under a few
> conditions:
> 1. Under different error distributions
> 2. Have the error term be dependent on the covariates
>
> But I'm not sure how to specify either conditions. I am usin
Hi,
I am trying to simulate a regression on survival data under a few
conditions:
1. Under different error distributions
2. Have the error term be dependent on the covariates
But I'm not sure how to specify either conditions. I am using the Design
package to perform the survival analysis using the
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