Displaying 20 results from an estimated 10000 matches similar to: "vectors / matrices"
2002 Dec 09
2
APL?
Hi,
is anybody out there who knows APL and would help me to translate 52
lines of APL code into propper R?
best,
Torsten
2004 Mar 03
2
read.spss and time/date information
I don't use SPSS but following through on your detective work
can provide the likely answer.
First note that both date numbers are evenly divisible by the number
of seconds in a day, i.e. 24*60*60. This suggests that these numbers
are seconds since some origin.
Since we know "2003/02/11" corresponds to 13264300800 we deduce that
the origin must be
spss.orig <-
2001 Feb 26
3
%*% in examples (PR#855)
Hi,
when we add
\examples{
a <- 1:4
a %*% a
}
into a Rd-file are run R CMD check, the resulting R code is
a <- 1:4
a
So, %*% ... is lost on the way if I'm not totally confused.
Torsten
--please do not edit the information below--
Version:
platform = i686-pc-linux-gnu
arch = i686
os = linux-gnu
system = i686, linux-gnu
status = Patched
major = 1
minor = 2.0
year =
2004 Apr 26
1
Segfault: .Call and classes with logical slots
Hi,
the following example aiming at a class containing a logical slot
segfaults under R-1.9.0 when `gctorture(on = TRUE)' is used:
Code code (dummy.c):
#include <Rdefines.h>
SEXP foo() {
SEXP ans;
PROTECT(ans = NEW_OBJECT(MAKE_CLASS("test")));
SET_SLOT(ans, install("lgl"), allocVector(LGLSXP, 1));
LOGICAL(GET_SLOT(ans,
2005 Nov 14
1
effect sizes for Wilcoxon tests
Hello,
I use t.test for normal distributed and wilcox.test for non-normal
distributed samples.
It is easy to write a function for t.test that calculates the effect
size, because all parts of the formula are available from the t.test
result: r = sqrt(t*t / (t*t + df))
However, for Wilcoxon tests, the formula for effect sizes is:
r = Z / sqrt(N)
I wonder how I can calculate the Z-score in R for
2005 Jan 25
4
typo in ?NotYetImplemented
The `examples' section says
plot.mlm # to see how the "NotYetImplemented"
# reference is made automagically
^
Best,
Torsten
2003 May 05
1
multcomp and lme
I suppose that multcomp in R and multicomp in S-Plus are related and it
appears that it is possible to use multicomp with lme in S-Plus given the
following correspondence on s-news
sally.rodriguez at philips.com 12:57 p.m. 24/04/03 -0400 7 [S] LME summary
and multicomp.default()
Is it possible to use multicomp with lme in R and if so what is the syntax
from a simple readily available
2006 Apr 24
3
gsub + backslashes
Dear developeRs,
I thought that backslashes can be escaped in the usual way (and I think I
did this before) but I can't see why
R> gsub("\\", "x", "\alpha")
Error in gsub(pattern, replacement, x, ignore.case, extended, fixed,
useBytes) :
invalid regular expression '\'
gives an error. Or am I just blind?
Best,
Torsten
R> version
2004 Mar 12
1
plot.dendrogram and expressions
Hi,
currently the "label" and "edgetext" attributes of a dendrogram are
coerced to character before they are added to a plot with `text'. Is there
a specific reason to do so (expect for the determination of the size of
the character string to be plotted)? Otherwise one could plot the
attributes directly via
diff dendrogram.R /usr/src/R/src/library/stats/R/dendrogram.R
2003 Sep 16
1
`var' broken in 1.8.0 alpha (2003-09-15)
Hi,
in last nights alpha version, `var' is broken:
R> var(rnorm(100))
Error in var(rnorm(100)) : 3 arguments passed to "cov" which requires 4.
which I suspect is due to recent changes to `cov'. The same is true for
R> cov(rnorm(100), rnorm(100))
Error in cov(rnorm(100), rnorm(100)) : 3 arguments passed to "cov" which
requires 4.
Best,
Torsten
R> version
2000 Dec 12
1
r-sync down?
torsten@www:/raid/home/torsten > ping rsync.r-project.org
PING franz.stat.wisc.edu (128.105.174.95): 56 data bytes
--- franz.stat.wisc.edu ping statistics ---
12 packets transmitted, 0 packets received, 100% packet loss
Torsten
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2002 Jun 27
1
F90 in packages
Hi,
did anybody manage to compile F90 sources in an R-package? The major
problem is, at least in my opinion, that non of the "free" F90 -> F77
converters is working correctly, at least for the F90 sources
I need to compile.
Torsten
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2001 Dec 10
1
Error on start
r-devel from this morning says
hothorn@www:~ > R
R : Copyright 2001, The R Development Core Team
Version 1.4.0 Under development (unstable) (2001-12-09)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type icense()' or icence()' for distribution details.
R is a collaborative project with many contributors.
Type
2004 Feb 17
2
Generating 2x2 contingency tables
Hello R-users,
I would like to generate two-way contingency tables with zero in one cell. I tried to use the function r2dtable but I could not force one cell to have zero value.
Any Idea?
Best regards..
Mahmoud
[[alternative HTML version deleted]]
2006 Nov 08
2
interprete wilcox.test results
Dear All,
I am using wilcox.test to test two samples, data_a and data_b, earch sample has 3 replicates, suppose data_a and data_b are 20*3 matrix. Then I used the following to test the null hypothesis (they are from same distribution.):
wilcox.test(x=data_a, y=data_b, alternative="g")
I got pvalue = 1.90806170863311e-09.
When I switched data_a and data_b by doing the following:
2001 Oct 05
1
1.4.0: mean/sum of logicals
the NEWS file in 1.4.0-devel states:
o mean() has `data frame' method applying mean column-by-column.
When applied to non-numeric data mean() now returns NA rather
than a confusing error message (for compatibility with S4).
which means:
R> mean(c(TRUE, FALSE))
[1] NA
Warning message:
argument is not numeric: returning NA in: mean.default(c(TRUE, FALSE))
but:
R>
2000 Oct 23
1
is.integer and rank
Hello,
why does
> test <- rank(sample(10))
> test
[1] 4 8 9 10 2 1 7 6 3 5
> is.integer(test)
[1] FALSE
> is.double(test)
[1] TRUE
make sense in R-1.1.1?
Torsten
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2000 Sep 26
1
Permutations
Hi,
this is maybe not a real R problem but I want to solve this in R ;-)
Consider the set of all permutations of 1:N (=: S, say) and a fixed
element a from S. I now need to compute the number of permutations s from
S which are elementwise less or equal to a: | { s \in S | s <= a } |
Of cource, backtracking using a tree structure is possible. Does anyone
know an efficient way?
Torsten
2001 Feb 01
1
postscript and lty
To the plot experts:
when creating a plot containing different lines, each with a special line
type, it may happen that the result of 'postscript()' is not readable by
ghostview (which may not be an R error, thus not bug report ;-).
This is the case when mixing lty as 0:6 and character or even when
using lty as character only.
Example:
postscript("test.ps")
plot(1:10,
2002 Jul 09
1
RE: mvtnorm package installation failure
Hi,
Thank you for the tip.
I tried to re-intall R from Debian "stable", in which R's version is 1.4.0. And the installation
of "mvtnorm" works.
I then re-installed R yet again from Debian "unstable" (woody), in which R's version is 1.5.1.
The installation of "mvtnorm" fails again with the same error message. Another package that
failed with the