Vladimir Dergachev wrote:
> Since this escaped my notice before, I thought it useful to post a link here
> -
> in case you have not seen it either:
>
> http://www.gnu.org/software/lightning/lightning.html
>
> This a portable JIT compiler library with fairly easy syntax (one syntax -
> many cpus)
Hi,
I noticed that with the GCC trunk (4.3.0), the semantics of "extern
inline" have reversed.
The net result is that R will build without the usual-stdc=gnu99 but it
won't with it.
Many multiple definitions result otherwise.
Marcus
__
R-devel@r-p
Hi Jim,
> x <- rnorm(12)
> t <- seq( as.Date("2006-04-01"),by="month", length=12)
>
> plot(x~t) # Has labels "May", "Jul", "Sep", "Nov", Jan", "Mar"
> xyplot(x~t)# Has labels "Jan", "Mar"
How about:
plot(x~t,xaxt="n")
axis(1,at=t,labels=format.Date(t))
___
Hi,
>> Beyond that, there may be a few more things that can be done to make R run
>> "stupidly fast" on ps3 or IBM Cell blades.
>>
>>
>
> Wouldn't the right way to go here be to make it use the PS3 graphics
> hardware, in a http://www.gpgpu.org/ kind of way? Or are the Cell
> processors o
Thomas Lumley wrote:
>> How big is your dataset? SQLite can be slow, but I didn't think it
>> was that slow.
>>
>
> 35x100 entries on 12 variables
>
I had a similar problem a while back and took the opportunity to test
various RDBMS. I found that a product called TimesTen from Oracl
Vladimir Dergachev wrote:
> Here is the second iteration of data frame subset patch.
> It now passes make check on both 2.4.0 and 2.5.0 (svn as of a few days ago).
> Same speedup as before.
>
Hi,
I was wondering if this patch would make it into the next release. I
don't see it in SVN, but it'
Hi Martin,
Conventions for optimizing away long, useless row name vector sound very
useful. Nice timings too!
I've noticed that before, and not been sure quite what to do. e.g. the
hdf5 module just gives up past a certain threshold as the long vectors
cause performance problems and HDF5 doesn
Vladimir Dergachev wrote:
> 2. It would be nice to have true hashed arrays in R (i.e. O(1) access
> times). So far I have used named lists for this, but they are O(n):
>
new.env(hash=TRUE) with get/assign/exists works ok. But I suspect its
just too easy to use named lists because it is e
