Displaying 3 results from an estimated 3 matches for "covnam".
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colnam
2000 May 02
2
Variable names in model formula
...ral covariates (X1, X2,..., Xn). I want to fit a Cox model for
>each of the covariate (univariately) and obtain the fitted probability of
>survival at a fixed time point t0 and covariate value Xi0. I tried to do
>this in a for loop where the index is the variable name as follows
>
>covnames <- names(...)
>for (covi in covnames) {
> survout <- coxph(Surv(time,status) ~ covi, data = dataname)
> print(summary(survfit(survout,newdata),t0))
>}
You could try
covnames <- names(...)
form <- Surv(time, status) ~ dummy
for(nam in covnames) {
form[[3]] <- as.nam...
2010 Aug 11
4
Arbitrary number of covariates in a formula
Hello!
I have something like this:
test1 <- data.frame(intx=c(4,3,1,1,2,2,3),
status=c(1,1,1,0,1,1,0),
x1=c(0,2,1,1,1,0,0),
x2=c(1,1,0,0,2,2,0),
sex=c(0,0,0,0,1,1,1))
and I can easily fit a cox model:
library(survival)
coxph(Surv(intx,status) ~ x1 + x2 + strata(sex),test1)
However, I want to
2000 Apr 30
0
Help Need with aov()
Hi there,
I'm using R1.0.1 Windows 98.
This file contains some inputs and an aov function code. Can someone
check it for me? Somehow I got completely different answer when typing
them in R and in Splus.
Splus gives me this:
> summary( Turnip.aov )
Error: Blocks
Df Sum of Sq Mean Sq F Value Pr(F)
Residuals 3 163.7367 54.57891
Error: Plots %in% Blocks