Displaying 20 results from an estimated 9000 matches similar to: "Google Summer of Code 2009"
2009 Jan 13
2
particulars of importing/loading libraries
Dear List:
Sorry for posting maybe a trivial question, but I have a basic
understanding problem. If I have say pack1 and pack2, two R packages,
and pack2 depends on and imports pack1 fully (as in the code below), is
there a way to make all the functionality of pack1 available for the
global and other environments (not only for the functions called from
withing pack2) by loading pack2 only? I
2008 Apr 07
3
Overriding axis formatting with custom Axis method, Axis.numeric etc
Dear list:
I would like to override the default way R formats plot axes with a
custom method(s). Obviously I would prefer to define it as general as
possible avoiding writing a custom method for each individual class
where possible.
The plot.default method (and I assume other methods as well) calls
Axis(...) to produce the axis layout depending on data. In this sense it
seems reasonable to
2009 Mar 13
1
Rd \usage clause for an S4 replace method
Given S4 methods [ and [<-, how do I write the Rd-file usage clause for
the latter one?
What I have now is:
\S4method{[}{TimeSeries,TimeDate,missing}(x, i, j, ..., drop)
\S4method{[<-}{TimeSeries,TimeDate,missing,ANY}(x, i, j, ..., value)
which results in the following output:
## S4 method for signature 'TimeSeries, TimeDate, missing':
x[i, j, ..., drop]
2008 Apr 10
1
ISOdate/ISOdatetime performance suggestions, other date/time questions
Dear list:
working with date/times I have come across a problem that ISOdate and
ISOdatetime are too slow on large vectors of data. I was surprised just
until I looked at the implementation and the man page: "ISOdatetime and
ISOdate are convenience wrappers for strptime". In other terms, they
convert data to character representation first in order to create a
POSIXlt object that is then
2009 Feb 11
1
setClassUnion with numeric; extending class union
Dear list:
I am looking for a good way to create an S4 class that would extend
numeric, but would allow NULL instead of data as well. As far as I can
see there is no way at the moment to do that, but please correct me if I
am wrong. The best solution I came up with so far was the following (it
also indicates a problem of using setClassUnion with numeric as one of
the classes):
I define a class
2010 May 07
1
Bug in R -e "command"
Hi all:
since about a month we encountered a problem with R -e command: spaces
in the "command" of R -e "command" are no more tolerated. This same
issue affects 2.11 patched (05-05-2010), 2.10.1, and current devel (at
least the one of two weeks ago).
(I skip the mid of the printouts, replaced with ...)
* R -e "message('aaa aaa')"
ARGUMENT
2008 Apr 22
1
graphics::Axis loosing S3/S4 class attributes of 'x' in 2.7.0 RC
Following my previous post on S3 method despatch, I put debug messages
in the code of Axis, Axis.default and plot.default in graphics/R/axis.R
and graphics/R/plot.R to print the class of x, at and y on plot. After
recompiling R, what I see is that x *lost* its class attribute (at least
for classes not known to 'graphics') in Axis, called directly from
plot.default and this could be the
2008 Sep 03
1
ugly plots with xlim/ylim exceeding data range (changed since R2.6.1)
The behaviour of the plot function when used with xlim/ylim and the
matplot function as in the following simple example changed between
R2.6.1 and 2.7.0+ producing ugly plots in the new versions. In case of
plot it looks like the pretty function is called with wrong arguments
(i.e. range of supplied data rather than values of xlim and ylim):
m = matrix(c(-0.033, 0.009, 0.064, 0.050, 0.097,
2009 Nov 03
1
likely bug in 'serialize' or please explain the memory usage
Hi all,
assume the following problem: a function call takes a function object
and a data variable and calls this function with this data on a remote
host. It uses serialization to pass both the function and the data via a
socket connection to a remote host. The problem is that depending on the
way we call the same construct, the function may be serialized to
include the data, which was not
2008 Apr 22
1
plot(x) in 2.7.0 (with y=NULL) proposed code correction
Hi all:
following the previous discussion, it looks like plot(x) with y=NULL
still does not work correctly. If one tries for example plot(1:5) it
works, but already for plot(runif(100)) it does not. I posted the
proposed correction for plot.POSIXct and plot.POSIXlt before. Please
voice your opinions whether the following fix for plot.default could be
reasonable? I include the full function and
2010 Apr 14
2
Why no race condition when returning UNPROTECT-ed memory from C?
Consider the C (or C++) code called from the .Call interface:
SEXP foo() {
SEXP *p = PROTECT(allocVector(REALSXP, 10));
...
UNPROTECT(1);
return p;
}
Why is there no danger that the allocated memory will be garbage
collected after the UNPROTECT, but before the return of p?
I have used code like this for some time and have never had a
problem, but I'm not sure if/why it is guaranteed
2009 Mar 30
1
CTRL-C during .Call causes R to quit to command line
Hello,
During a .Call e.g
while(TRUE){
value <-rhsqnextKVR(rdr) ## has .Call in this function
if(is.null(value)) break;
}
if I press CTRL-C, R exits straight to the command line.
Q: How can I prevent this? I should point out that my library uses
JNI, so I'm not sure if that is causing it.
I'm using R-2.8 on Linux (RHEL 5)
Thank you in advance
Regards
Saptarshi
2008 May 07
1
optional setValidity()
Hi
Suppose I have an S4 class "foo" and a validity checking
function ".checkfoo()":
setClass("foo", representation=representation("numeric"))
setValidity("foo" , .checkfoo)
is fine; in my application, .checkfoo() verifies that a bunch
of necessary conditions are met.
But .checkfoo() is very time consuming and I want
to give users the option
2009 Jan 15
1
[Q] R CMD check signals error on code that works from UI
Add the following to example section of a dot-Rd manpage:
## :WHY: The following kills R CMD check but runs fine on console.
foos <- c("aaa", "bbb", "ccc")
cat(sapply(foos,
function(foo) {
sprintf("name: %-18s upper: %s\n",
foo,
toupper(foo))
}), sep="")
R CMD
2008 Nov 24
2
handling a matrix and .C
Hello R-devel,
I want to write extensions for R in C (maybe C++ and Fortran later) and it works fine, but there is one problem, which I cannot solve (in my view).
I want to handle a matrix from R in C. For arrays there is "as.double(...)", but nothing for a matrix.
I searched a while, but didn't find something.
Last I looked at the source code of e1071 and of the core itself and
2005 Feb 25
3
passing command line arguments to 'R CMD BATCH myScript.R'
Hi Community,
I have a question about how to pass command line parameters to R script
running in the batch mode. The problem is: there is a banch of data
files which are to be processed by R script called from a web-server,
i.e. in the batch mode. The web server generates data files and passes
their names calling 'R CMD BATCH' one by one for every file. Now the
question is how to
2009 Mar 10
1
S4 generic masking S3 generic when using namespace
Hi,
I have two example packages, test1 and test2, where the only code in
them is:
setGeneric("predict", function(object, ...) standardGeneric("predict"))
(get them from http://www.cs.mu.oz.au/~gabraham/test1.tar and
http://www.cs.mu.oz.au/~gabraham/test2.tar)
The difference between them is that first does not have a namespace, and
loads fine. The second has a namespace
2008 May 08
2
Linux installation
I have just installed R under Linux and had a tricky time finding out
that I needed to install r-devel as it was not suggested by yum and does
not appear in any of the FAQs. Everything was fine until I tried to
install tseries then I was told in the compiler output that R.h was
missing. Obviously a search on Google proved fruitless and I was forced
to ask on r-help. I am now kicking myself, of
2008 Sep 09
1
'xtfrm' performance (influences 'order' performance) in R devel
Hello everybody,
it looks like the presense of some (do know know which) S4 methods for a
given S4 class degrades the performance of xtfrm (used in 'order' in new
R-devel) by a factor of millions. This is for classes that ARE derived
from numeric directly and thus should be quite trivial to convert to
numeric.
Consider the following example:
setClass("TimeDateBase",
2007 Feb 13
2
anyone has C++ STL classes stability issue if used with R
Hello,
is there any one who uses C++ STL classes when programming shared libs
for R and has had any problems with STL?
In the very simple example below I am constantly getting segfaults when
trying to populate the queue. The segfault occurs at what looks like a
random index in the loop when pushing another element to the queue.
Reproduced on 4 machines. Object x is an Image as in EBImage,