On 07/08/2008 3:56 AM, Trev101 wrote:
Hey,
I am just starting to learn R now and I typed in this simple survival
program:
library(survival)
t <- c(10,13,18,19,23,30,36,38,54,56,59,75,93,97,104,107,107,107)
c <- c(1,0,0,1,0,1,1,0,0,0,1,1,1,1,0,1,0,0)
data <- Surv(t,c)
km <- survfit(data)
summary(km)
Call: survfit(formula = data)
but everytime I run it I get this error:
Error in eval.with.vis(expr, envir, enclos) : object "Call" not found
Can someone please help me out I really have no idea wat I have done wrong.
I have installed the survival library is there maybe some other library I
need to install?
The last line, "Call: survfit(formula = data)", is not R code. It is
the first line of the output you should expect to see, i.e.
> library(survival)
Loading required package: splines
> t <- c(10,13,18,19,23,30,36,38,54,56,59,75,93,97,104,107,107,107)
> c <- c(1,0,0,1,0,1,1,0,0,0,1,1,1,1,0,1,0,0)
> data <- Surv(t,c)
> km <- survfit(data)
> summary(km)
Call: survfit(formula = data)
time n.risk n.event survival std.err lower 95% CI upper 95% CI
10 18 1 0.944 0.0540 0.844 1.000
19 15 1 0.881 0.0790 0.739 1.000
30 13 1 0.814 0.0978 0.643 1.000
36 12 1 0.746 0.1107 0.558 0.998
59 8 1 0.653 0.1303 0.441 0.965
75 7 1 0.559 0.1412 0.341 0.917
93 6 1 0.466 0.1452 0.253 0.858
97 5 1 0.373 0.1430 0.176 0.791
107 3 1 0.249 0.1392 0.083 0.745
Duncan Murdoch
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