Hi, I am performing Cox proportional hazards
regression on a microarray dataset with 15000 genes.
The p values generated from the Cox regression (based
on normal distribution of large sample theory) showed
only 2 genes have a p value less than 0.05. However,
when I did a permutation on the dataset
Hi, I am running some Cox modeling on large number of
variables (thousands) using apply. For some reasons,
some of the variables have problems in Cox regression,
so the the run was stopped automatically. Is there a
way to keep the running for all the variables to
complete and let us, when done, to
Hi, is there an excellent source of documentation for
installation, configuration of R packages
(Rmpi,snow,rsprng etc.) for parallel computing on
linus system?
Thanks
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R-help@stat.math.ethz.ch mailing list
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Hi,
Is there a R test available that tests whether 2
hazard ratios obtained from Cox regressions on the
same patient sample by 2 different classifiers are
significantly different?
Thanks
Steve
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R-help@stat.math.ethz.ch mailing list
Hi,
I am using Partek for LDA analysis. For a binary
response variable, it generates 2 discriminant
functions, one for each of the 2 levels of the
response variable. And I can simply calculate 2
discriminant scores (say d1 and d2) for each sampples
using the 2 discriminant functions, then I can
Hi,
I have difficulty in installing package snow from
CRAN. Somehow, this package is not shown up in the
available package list when I tried to use the GUI
interface. So I have to go to CRAN to download the
source file: snow_0.2-1.tar.gz. Then I tried to
install it using the following command:
If the treatment contrast is used, the p value for x1
is testing whether the slope at the reference level of
x2 is equal to 0 (think about the model y~x1*x2 as
fitting 2 straight lines, one for the reference level
of x2, and one for the other level of x2). I am not
quite sure about what it tests
