In the meantime, we have R (an Splus clone) on all the windows machine.
I have written
a short note on R
(sort of R survival guide).
Some R/Splus functions that I wrote or modified.
- simple bootstrap. Another simple bootstrap. This modification of the function given in Efron and Tibshirani's book makes the successive run of the bootstrap( ) function consistent. For example boot2(x,10,theta) and boot2(x,20,theta) will have their first 10 values exactly the same if you set the same seed.
A simple R function for compute the Kaplan-Meier estimator.
A simple R function for compute the Nelson-Aalen estimator.
An S/R function for compute the Kaplan-Meier estimator at given times.
(needs survival package) [this is too complecated, see below.]
A simple S/R function for compute the Kaplan-Meier estimator at given times. (needs survival package)
An R function for compute confidence intervals by nonparametric bootstrap bias corrected percentile method.
An R function for compute confidence intervals by nonparametric bootstrap percentile method.
A two-sample log-rank test, for R.
A one-sample log-rank test, for R.
A combined test, good for cross hazard alternative.
Compute the power of a one sample binomial test.
Compute the power of a chi-square test, for testing the equality of several proportions (rates).
Compute the power of an F-test, in the oneway ANOVA setting.
Estimate the hazard function from right censored sample.
Fake data from n, xbar, and s. This might be used to do a t-test, or z-test.
Z-test (t-test with a known var) .
Splus Functions to do stepwise regression by PRESS
Some R/Splus or SAS examples.
An example of use apply with 3-dim
array and survfitA sas example.
A sas example of logistic regression.
A sas example (oneway ANOVA).
A sas example (2 way ANOVA).
A sas example (ancova).
A sas example: proc lifetest.
A sas example of proc lifereg.
SAS examples of phreg
Move data from SAS to R
Some Links:
Graph in LaTexScompile. (translate S to C)
A book called Spoetry. (for programmers.)