On Tue, 24 Aug 2010, Dirk Eddelbuettel wrote:
On 24 August 2010 at 15:40, Hadley Wickham wrote:
| Hi all,
|
| If a package suggests another package in its description, you can
| check it at runtime with requires. How do you do check if a package
| is available without loading it, if you only w
> "RL" == Roebuck,Paul L
> on Tue, 24 Aug 2010 11:06:54 -0500 writes:
RL> I have two packages, one that does the actual work (SC)
RL> and the other a Tcl/Tk UI (SCUI) that invokes methods
RL> within the former. Within the SCUI's invocation method,
RL> I save an object
On Tue, Aug 24, 2010 at 3:50 PM, Prof Brian Ripley
wrote:
> On Tue, 24 Aug 2010, Hadley Wickham wrote:
>
>> Hi all,
>>
>> If a package suggests another package in its description, you can
>> check it at runtime with requires. How do you do check if a package
>
> Well, not really as requires() can
> But thereby clobber your users with the run-time cost of
> installed.packages() (which can take several minutes on some Windows
> systems, and just took ca 12secs on my fastest Linux server with 3000
> packages installed). If you want to take this route (is a package
> installed?), see the 'Note
On Tue, Aug 24, 2010 at 6:55 PM, Henrik Bengtsson
wrote:
> isPackageInstalled <- function(package, ...) {
> path <- system.file(package=package);
> (path != "");
> }
>
> taken from R.utils (which also has a isPackageLoaded()).
Nice quick hack (subject to caveats Brian mentions). Thanks!
Hadl
On 25 August 2010 at 08:06, Prof Brian Ripley wrote:
| On Tue, 24 Aug 2010, Dirk Eddelbuettel wrote:
|
| >
| > On 24 August 2010 at 15:40, Hadley Wickham wrote:
| > | Hi all,
| > |
| > | If a package suggests another package in its description, you can
| > | check it at runtime with requires. Ho
Hi, I'm following up to a post I made to r-help here:
http://r.789695.n4.nabble.com/Trouble-configuring-R-to-use-ACML-tt2337193.html#a2337193
I have verified that LD_LIBRARY_PATH is set... I set it in /etc/bash.bashrc
(is that ok?) and it shows up when I echo $LD_LIBRARY_PATH I also tried
adding
Ok, I have verified that ACML appears to be working because when I run
set.seed (1)
m <- 1
n <- 5000
A <- matrix (runif (m*n),m,n)
system.time (B <- crossprod(A))
It multi threads properly. My initial test script doesn't seem to utilize
multiple cores, I am going to paste it below if anyon
Should there be a [[<-.factor() that either throws
an error or acts like [<-.factor() to avoid making
an illegal object of class factor?
> z <- factor(c("Two","Two","Three"), levels=c("One","Two","Three"))
> z
[1] Two Two Three
Levels: One Two Three
> str(z)
Factor w/ 3 levels "On
I've looked at how to speed up the transpose function in R
(ie, t(X)).
The existing code does the work with loops like the following:
for (i = 0; i < len; i++)
REAL(r)[i] = REAL(a)[(i / ncol) + (i % ncol) * nrow];
It seems a bit optimistic to expect a compiler to produce goo
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