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2010 Mar 09
1
Question on passing in parameter to Cox hazard
...x model using a matrix. The following lines illustrate what I want to do:
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dat <- matrix(rnorm(30), ncol=3,dimnames = list(1:10,letters[1:3]))
Survival <- rexp(10)
Status <- ifelse(runif(10) < .7, 1, 0)
mat <- as.data.frame(cbind(dat,Survival,Status))
cmod <- coxph(Surv(Survival, Status) ~ a+b+c, mat)
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This works fine. However, I need to change the code so that the column headers ( a+b+c )are passed into the coxph function on the fly. What string/object do I need to generate so the function works? I am trying:
# F...
2006 Oct 12
3
Bug in lowess
x <- c(0,7,8,14,15,120,242)
y <- c(122,128,130,158,110,110,92)
lowess(x,y)
$x
[1] 0 7 8 14 15 120 242
$y
[1] 122.0000 128.0000 132.2857 158.0000 110.0000 -4930.0000
110.0000
R version 2.2.1, 2005-12-20, i486-pc-linux-gnu
attached base packages:
[1] "methods" "stats" "graphics" "grDevices" "utils"