[R] how to obtain the CPU time of my program

[Christian Kohler]

Hi,

first of all 'sorry' for my rather late post on this topic...

Did you already came across the R command 'Rprof' ? This might help you
to find answers to your problem in terms of CPU time/command.
I use 'Rprof' like this:

>Rprof()
>source("yourCode.R")
>Rprof(NULL)

This produces a file called Rprof.out in your working directory.
Quit R and type 'R CMD Rprof Rprof.out'.

I am too new in using those profiling methods of R but I think they are
pretty handy.

Try out ?Rprof for detailed information.

Cheers,
Christian



gang xu wrote:
> Dear R users and experts,
>
> I am current running a program (a series of commands) in R. such as:
>
> A <- as.matrix(read.table("C:/LP.txt"));
>
> a=which(memb==q); b=a; B=as.matrix(A[a,b])
>
> LS=sum(B)/2;
>
> TL=sum(A)/2
>
> i<-c(1:NN);
>
> D=sum(A[a,i]);
>
> how can i obtain the CPU time used for these commands ?
>
> I have seen the system.time function but i am not sure how to use it. Could anyone help me ?
>
> ****** If we have a number of commands, how can we know the CPU for these commands *******
>
>
> Thanks a lot for your time and help
>
> Have a nice day!
>
> Warm Regards
>
> Marshall
>
>
> 	[[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.
>   


-- 

Christian Kohler
Institute of Functional Genomics
Computational Diagnostics
University of Regensburg (BioPark I)
D-93147 Regensburg (Germany)

Tel. +49 941 943 5055
Fax  +49 941 943 5020
christian.kohler at klinik.uni-regensburg.de