Displaying 20 results from an estimated 800 matches similar to: "fft"
2003 Jul 04
2
(PR#3400)
Martin Maechler asked me to restate my problem.
Compiling the file (slightly modified w.r.t. the formerly
attached file) that can be found at
http://www.geo.uni-bayreuth.de/~martin/filetransfer/xswms2d.Rd
terminates with the error message
******* Syntax error: mismatched or missing brackets in
/-----
.....
\-----
when compiled by
R CMD Rdconv -t txt xswms2d.Rd
However, the file does
2003 Jul 04
1
R documentation -- buffer overflow? (PR#3400)
Hi,
I have attached a larger Rd file that causes an error when
compiled by
R CMD Rdconv -t txt xswms2d.Rd
(for example). If the size is reduced the error vanishes,
see the lines 230 and 527 in the file.
I could not find an error within my text and so my guess
is that there is some buffer overflow within the compiler.
If it is me who has caused the error please let me know --
and many
2001 Jun 12
1
help(PackageName)
Dear R Core Team,
I'm wondering whether it is useful that every package should allow
for help(PackageName), giving some general information about the
package (more/nicer than library(help=PackageName)). This man page
may include some mathematical or statistical background, or contain
a guideline for the package.
Cheers,
Martin
--
Martin Schlather email:
2001 Mar 13
1
.C-calls
Dear all,
(sorry I got the wrong button for subscribing a minute ago)
At the moment I'm writing on a package for random field
simulation that I'd like to make publically availabe
in near future.
To this end I've asked Martin Maechler to have a look
at my R-code. He was very surprised about how
I perform the ".C"-calls, and encouraged me to
make this request for comments.
2002 Apr 04
3
assign, documentation (PR#1434)
Hi,
The help for `assign' says
In all the assignment operator expressions, `x' can be a name or
an expression defining a part of an object to be replaced (e.g.,
`z[[1]]'). The name does not need to be quoted, though it can be.
So I would expect that by
a<-1:4
assign("a[1]",2)
the first component of a gets the value 2, but the object "a[1]" is
2002 Jul 30
1
Optim() returns wrong maximum
Dear R-devel
During the last half a year I have several times encountered the
following problem with optim() when using method= "L-BFGS-B".
The function return a value which is clearly not the maximum (seen from
printing the value each time the function is called). Some output is
shown below.
A few things I have observed (as I remember it):
a. The problem seems to occur when the
2002 Jul 19
1
read.table bug (PR#1809)
Full_Name: Michael McStephen
Version: 1.5.1
OS: Win2000
Submission from: (NULL) (203.25.148.63)
When using read.table to read a data file section by section, I get an error
that indicates R is attempting to read more "fields" than exist.
The Data file looks like this:
---Start of file tmp.txt-----------
Response Types = TPos TNeg FPos FNeg Anti Post MaxO
Test ID,Username,Start
2001 Mar 14
0
segmentation fault of unknown cause (PR#877)
Dear all,
Paulo Ribeiro, p.ribeiro@lancaster.ac.uk, and myself noticed
that R sometimes breaks down with a segmentation fault of
(at least for us) unknown course. (We've read #411 and #671
in the bug report on "optim" -- the problem described
there sounds familiar; but we have not found any hint on a
segmentation fault.)
Please find at the very end of this email the file
1999 Apr 22
1
mvfft (PR#176)
This message is in MIME format
--_=XFMail.1.3.p0.Linux:990422185944:4782=_
Content-Type: text/plain; charset=us-ascii
R-0.64.0 on RedHat Linux 5.1
Some problems with multivariate fast fourier transform. I
have attached the dump of a 30 x 3 matrix that seems to
reliably reproduce these problems
1) mvfft doesn't like vectors. It complains about not having
enough memory:
R>
2024 Oct 22
1
invalid permissions
Dear Prof. Roger Koenker,
On Tue, 22 Oct 2024 09:08:12 +0000
"Koenker, Roger W" <rkoenker at illinois.edu> wrote:
> > fN <- rqss(y~qss(x,constraint="N")+z)
>
> *** caught segfault ***
> address 0x0, cause 'invalid permissions?
Given a freshly produced quantreg.Rcheck directory, I was able to
reproduce this crash by running
R -d gdb
# make
2010 Apr 03
2
(OT) OpenOffice.org calc chart strangeness.
I am attempting to create a simple line chart graphing three columns from a
soffice-calc spreadsheet. I expect it to take the leftmost column as the
X-Axis, plotting the others on the Y-Axis, but it always creates an X-Axis
of the row number in the columns, and the first column amongst the data.
I have tried this on OpenOffice.org 3.2.0, NeoOffice(R) 3.0.2 Patch 2,
iWork Pages, and Excel 12.2.4
2007 May 21
1
size limit in R?
Hi,
Please see the email exchanges below. I am having trouble generating output that is large enough
for our needs, specifically when using the GaussRF function. However, when I wrote Dr. Schlather
(the author of the GaussRF function), he indicated that there is also a limit imposed by R itself.
Is this something that we can overcome?
Thank you very much for any assistance you may provde.
2009 Mar 25
2
Listing of LAPACK error codes
Professor Ripley commented on LAPACK error codes:
https://stat.ethz.ch/pipermail/r-help/2007-March/127702.html and says
"Internal LAPACK errors are usually problems with arithmetic accuracy,
and as such are compiler- and CPU-specific."
Is there a listing for the error codes from Lapack routine 'dsyevr'?
Especially I am interested about the meaning and handling of error codes 1
2007 Oct 10
2
documentation of .C (PR#9948)
Full_Name: Martin Schlather
Version: R version 2.7.0 Under development (unstable) (2007-10-01 r43043)
OS: Linux
Submission from: (NULL) (91.3.209.203)
Hi,
There are 2 dangers with using 'DUP=FALSE' mentioned:
* formal arguments
* lists
Would you also mention a third one, namely
that values in R are now only referenced whenever
possible and not always copied; hence .C(...,
2005 May 09
2
use "integrate" for functions defined in C, not R
Dear all,
I am trying to use the C code for "integrate" function ( that calls
Rdqagi and Rdqags) so that I can integrate a function defined in C,
instead of passing from R.
Is there a way for doing this?
My unsuccessful attempt:
I looked into the files (including integrate.c, Applic.h) and
1. modified the definition of
"integr_fn" by droping the environment
2009 Jan 27
1
uninitialised value in R (PR#13476)
Hi,
I get an "Conditional jump or move depends on uninitialised value(s)"
from valgrind when using 'solve' in combination with some simple
C-code. (I did not use other functions of R besides 'solve'.)
In detail: running
R --vanilla -d "valgrind --tool=memcheck --memcheck:leak-check=yes
--num-callers=20 "
and calling
.Call("XXX")
nd <- 3
2004 Jan 30
2
request for comments --- package "distr" --- S4 Classes for Distributions
Hello,
after some discussions with Martin Maechler and Josef Leydold (WU Wien),
we have felt the need for some package that should allow for an
object-orientated
approach to distributions.
Our small group at Bayreuth now has developed a package "distr" which
tries to fill this gap, implementing distributions by means of
S4--classes.
A mother class "Distribution" is
2006 Mar 30
1
function min does not return correct result if .Machine$integer.max is involved (PR#8731)
Full_Name: Martin Schlather
Version: 2.2.0 and alpha 2.3.0 (06/3/29)
OS: Linux (x86_64 and Intel)
Submission from: (NULL) (139.11.183.106)
> min(.Machine$integer.max, 10^20)
[1] 1e+20
> min(as.integer(.Machine$integer.max), 10^20)
[1] 1e+20
but
> min(.Machine$integer.max + 0, 10^20)
[1] 2147483647
> min(as.integer(.Machine$integer.max - 1), 10^20)
[1] 2147483646
>
2009 Dec 29
1
different behaviour of NAs under valgrind (PR#14171)
Full_Name: Martin Schlather
Version: 2.10.0
OS: linux
Submission from: (NULL) (91.3.220.231)
Bug summary:
some functions behave differently for NAs when
valgrind is used in R, e.g. sum and prod
Bug demonstration:
--- without valgrind ----
> sum(c(NA,1)[1])
[1] NA
--- with valgrind ----
> sum(c(NA,1)[1])
[1] NaN
R call with valgrind:
R -d "valgrind --tool=memcheck
2002 May 17
0
What is the most efficient way to assign to PARTS of obje cts in other frames/environments?
For nested function calls it appears that a combination of environment()
and '<<-' will also work:
f1 <- function() {
x <- rep(NA,4) # Object to be modified by function f2
environment(f2) <- sys.frame(1) # Make f1's environment available to f2
f2(2) # Changes 2nd element of x
print(x)
}
f2 <- function(i) {
#