change codes into loops
On Jan 18, 2010, at 7:58 PM, David Winsemius wrote:
On Jan 18, 2010, at 7:19 PM, rusers.sh wrote:
Hi,
See example.
for (i in 1:2) {
for (j in 1:3) {
b_1[i,j]<-rank(c(a1[i,j],a2[i,j],a3[i,j]))[1]
b_2[i,j]<-rank(c(a1[i,j],a2[i,j],a3[i,j]))[2]
b_3[i,j]<-rank(c(a1[i,j],a2[i,j],a3[i,j]))[3]
}
}
The inner codes is really repeated, so i want to change the inner
codes
into loops. Take nn is from 1 to 3,
something like,
Anybody can tell me the correct method to specify the above codes?
There is no correct method.
I take that back.
You cannot index on the object name b_nn that way. R has not been developing using a syntax with that much flexibility. If you want a 3D array of values, then you could create b_ijn[i, j, nn] and make assignments to it.
You could make a list of matrices:
for (nn in 1:3) {
bn[[nn]] <- b[i,j] <- rank(c(a1[i,j]:a3[i,j]))[nn]
# assuming that your right hand construction is meaningful,,,,
impossible to tell without an example.
}
But if you tried to do this with paste and assign, you will spending considerably more time degbugging it than it is worth and it would likely be more inefficient than what you have. -- David.
Thanks. -- ----------------- Jane Chang Queen's [[alternative HTML version deleted]]
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD Heritage Laboratories West Hartford, CT
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD Heritage Laboratories West Hartford, CT