Displaying 20 results from an estimated 5000 matches similar to: "APL?"
2001 Oct 18
1
vectors / matrices
Hi,
a friend of mine came across this
R> x <- 1:5
R> cbind(x,x)
x x
[1,] 1 1
[2,] 2 2
[3,] 3 3
[4,] 4 4
[5,] 5 5
R> rbind(x,x)
[,1] [,2] [,3] [,4] [,5]
x 1 2 3 4 5
x 1 2 3 4 5
x is a vector and therefore has no dim-attribute. Obviously cbind treats x
as a col-vector but rbind treats x as a row-vector, that is: two
functions have a different
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 <-
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,
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 =
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
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
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
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
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]]
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>
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:
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
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
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,