[R] Analog to matlab repmat function
Gabor Grothendieck
ggrothendieck at gmail.com
Mon May 29 13:13:23 CEST 2006
Actually google does understand R. For example,
1. google for:
R
and you will get the R home page.as first hit
2. google for
R repmat
and you will find Robin Hankin's lexicon that translates between
R and octave/maxima which includes a repmat function as 7th hit.
On 5/29/06, Daniil Ivanov <daniil.ivanov at gmail.com> wrote:
> Thanks a lot to all of you!
>
> Now I see, that use of R (and S) is very different from use of Matlab.
> There is no one-to-one correspondence.
> I'm shy to ask so stupid questions, but name of language R
> makes it hard to find relevant links trough google.
> Thanks for pointing to "S Poetry", I would never find it alone,
> since I was looking for R-related info.
>
> Thanks, Daniil.
>
> On 5/29/06, Patrick Burns <pburns at pburns.seanet.com> wrote:
> > S Poetry may be of use to you.
> >
> >
> > Patrick Burns
> > patrick at burns-stat.com
> > +44 (0)20 8525 0696
> > http://www.burns-stat.com
> > (home of S Poetry and "A Guide for the Unwilling S User")
> >
> > Daniil Ivanov wrote:
> >
> > >Hello,
> > >
> > > I'm trying to switch from Matlab to R-project, and having some difficulties.
> > > I make a use of multidimensional matrices. For example, I need to extract
> > > mean from one of the dimensions:
> > >
> > > % we have matrix data of size: 130 x 11 x 350 x 2
> > > data = data - repmat(mean(data,3),[130 1 1 1]);
> > >
> > > In R project I managed to do that in a very pervarsive way:
> > >
> > > # mean(data,3) in R
> > > base <- apply(data,c(2,3,4),mean)
> > > # repmat(...,[130 1 1 1])
> > > base <- rep(base,130)
> > > dim(base) <- c(11,2,350,130)
> > > base <- aperm(base,c(4,1,2,3))
> > > # data = data - repmat
> > > data <- data - base;
> > >
> > > Could you please show me a more elegant way of doing the same in R :)
> > >
> > >Thanks, Daniil.
> > >
> > >______________________________________________
> > >R-help at stat.math.ethz.ch mailing list
> > >https://stat.ethz.ch/mailman/listinfo/r-help
> > >PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
> > >
> > >
> > >
> > >
> >
>
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