Erik Iverson wrote:
> dhi...@sonic.net wrote:
> > This might be a dumb question, but I couldn't figure out how to find
> > the answer: why is it that comments in R documentation files (i.e. in
> > examples) typically start with a double hash (##) instead of a single
> > hash?
> See the second pa
Thanks very much, Uwe. The calculation time is now comparable with matlab.
Oyvind
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A colleague designed a script for a bar plot, which I'd like to export to my
directory via the barplot command:
bitmap(file="barplot.tif", type="tifflzw", height=4, width=6.5, res=1250)
Unfortunately, this command produces the following error message:
Error in system(paste(gsexe, "-help"), int
x <- NA
na.act <- na.action(na.exclude(x))
y <- rep(0,0)
naresid(na.act,y)
... currently produces the result...
numeric(0)
... whereas the documentation might lead you to expect
NA
The behaviour is caused by the line
if (length(x) == 0L) return(x)
in `stats:::naresid.exclude'. Re
On 14.01.2011 11:38, Joris Meys wrote:
Please give the code you used for the matrix multiplication. 5 times is a
bit much.
No, it is reasonable for matrix multiplication:
Matlab ships with optimized BLAS for various CPU types. In R, you have
to get an optimized BLAS yourself.
How to link
Please give the code you used for the matrix multiplication. 5 times is a
bit much.
On Fri, Jan 14, 2011 at 9:09 AM, oyvfos wrote:
>
> Hi,
> A quick bench-mark of an R matrix muliplication 500by500 X 500by1, all
> random variates, with matlab reveals a huge difference in speed (5 times at
>
Hi,
A quick bench-mark of an R matrix muliplication 500by500 X 500by1, all
random variates, with matlab reveals a huge difference in speed (5 times at
least). Is there anything that can be done in R to speed up the
multiplication?
Kind regards, Oyvind
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