On Apr 26, 2012, at 3:40 PM, michaelyb wrote:
David -
My question to you may sound (actually, it really is) silly, but
please do
take your time to answer it.
What is the difference between:
fac<-function(x){a<-1
for (i in 1:x){
a<-a*i
}a}
and:
fac<-function(x){a<-1
for (i in 1:x){
a<-a*i
}
a}
In R parsing, there is an implicit command separator performed by the
end-of-line character. To get the first one to run without adding an
end-of-line you can use a semi-colon:
fac<-function(x){a<-1
for (i in 1:x){
a<-a*i
}; a}
Some people get annoyed when these are added unnecessarily, as may
happen for SAS programmers who come over to R and are used to always
using semicolons.
I did try the first one, but I got an error message, so I thought I
was
doing something wrong. However, once it finishes the loop, why the
difference between the last lines?
--
David Winsemius, MD
West Hartford, CT
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