Hi everyone
I am trying to use some foreach loops to run various stcox models and
to use testparm on them. I have a problem on the second run on each
loop. What I'm doing is more complex, but the following code on the
system "cancer" dataset causes the same problem:
sysuse cancer
stset studytime, fail(died)
xi i.drug
local model1 ""_Idrug*""
local model2 ""_Idrug* age""
local models "`model1'" "`model2'"
local options ", nolog"
foreach m in `models' {
stcox `m' `options'
foreach var in `m' {
testparm `var'
}
}
This works fine for model1, which produces results as expected, but on
model2 it generates the error message:
"option nolog not allowed"
I don't think it's a function of the way I have written the loop, as
an analogous loop with the regress command works perfectly well:
sysuse auto
xi i.rep78
local model1 ""_Irep78*""
local model2 ""_Irep78* weight""
local models "`model1'" "`model2'"
local options ", noheader"
foreach m in `models' {
regress price `m' `options'
foreach var in `m' {
testparm `var'
}
}
Can anybody explain why this is happening?
Thankyou
Karin
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