Re: [R] Replace two nested loop with an apply kind of function

Dear Professor, thank you very much your suggestion. Yes, the real problem is the speed. I will check and try to understand how to use that R package, although it seems that it requires some knowledge of C++. Thank you very much once again, gul > The only reason to use one of the apply famil

[R] Replace two nested loop with an apply kind of function

Dear R users, I am confused with the usage of apply kind of functions instead of nested loops. Let me illustrate my problem, I have an array,named C, with dimesions c(nr,nr,nt*n). I want to fill in a Tmat array according to the rule as given below: Tmat<-array(diag(nt*nr), c(nt*nr,nt*nr,n)) fo