Displaying 20 results from an estimated 600 matches similar to: "References of R in use"
2002 Jan 03
2
Different behaviour of data()
Dear List,
I frequently use the
data()
function to load csv files (with separator ";") into R session,
typically
data(myfile)
loads myfile.csv from my working/data directory into R.
Now, in 1.4.0 version, everything works as expected, but with one
difference:
The values readed in older versions in "num" mode are now readed as "int"
mode,
converting the values
2002 Jul 11
1
How to get relevant dimnames from apply() ?
Hello,
in order to vectorize task (of plotting barplots), I use, as probably all
R-folks, function apply()
instead of for() loop.
<R>
testarr<-matrix(1:30, nrow=5)
rownames(testarr)<-letters[1:5]
colnames(testarr)<-LETTERS[1:6]
apply(testarr,1,function(x) {x11(); barplot(x)}) #the funcion used is
actually more compex, but it doesn't matter
</R>
Now, how I can propagate
2001 Jul 24
2
segmentation fault
I'm experiencing segmentation faults from time to time
that abruptely end my R sesion. In such cases, is there
any way to recover the work done? (i.e., is there
any temporal file that I could use?)
Thanks
Agus
Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo at ija.csic.es
2001 Nov 08
1
Generalized Lambda
Anyone know of a package for numerically estimating lambda(3) and lambda(4)
using location, position, skew and kurtosis estimates. I have a distribution
and would like to use the gld package to do some simulations of the
distribution, but need the lambda estimates to feed into gld.
I have a program in Maple, which I may convert to C code for use in R, but
before moving down that road I
2001 Jun 29
1
New post to data() function does not load a csv file in 1.3.0 (SOLVED)- a search problem?
Dear List,
I have found that moving the csv file to [working directory]\data directory
solves my "problem",
the file was loaded correctly.
But I thought that R serches in all packages\data AND the [workdir]\data
dirs, as mentioned in
help.
>?data
Is this as problem or am I missing something important?
(the latter is more probable :), but then why the behaviour is different
from
2001 May 30
3
Transformation of dissimilarity or distance matrix
Dear List,
is there an elegant (or even not elegant) way how to transform
dissimilarity or distance matrix A
(or, in general, arbitrary symmetrical matrix) by transposition of rows and
columns into a form
closest to "block diagonal" matrix B?
The matrix A is adjusted the following way
A[A<epsilon] <-0 #(epsilon is given "small" number)
B: (in its ideal form)
2001 Aug 03
2
Math symbols in email - not completely OT
What is the generally accepted way to put certain math symbols into plain
text email?
For example, how does one convey the "is exactly equal to", "is
approximately equal to", and "delta" symbols in a standard text-based (e.g.
Courier) font?
Dr. Marc R. Feldesman
email: feldesmanm at pdx.edu
email: feldesman at attglobal.net
fax: 503-725-3905
2001 Oct 22
2
OT: compare several graphs
Hi all,
this is OT, but maybe someone can give me a clue. I've got data from eye
tracker experiments (750 data points). These figures show how the data
lock like
|** * ***** |*** ******
| ** **** | * *
| | * *
| | *
|-------------- |---------------
Y axes display velocity, x axes display time, * are the data points.
2002 Mar 13
3
plot
Hello!
I use the version 1.4.0 for Windows. I have made boxplots but only half of
the symbols (three letters each) show up on the X-axis? How t can one
change their size or orientation so that all show up? I attach the pdf file
to illustrate better the problem.
Regards
Martin
Martin Lascoux
Department of Conservation Biology and Genetics
Evolutionary Biology Center
Norbyv?gen 18D
75236
2002 Mar 20
4
A Very Trivial Question
Hi,
This is a very trivial question, and I do not know why I cannot remember
the answer at all!
How does one get the entire system information (which OS, R
version....etc) using an R command?
Thanks,
Kevin
------------------------------------------------------------------------------
Ko-Kang Kevin Wang
Postgraduate PGDipSci Student
Department of Statistics
University of Auckland
New Zealand
2002 Jul 22
3
Vector Manipulation
Greetings,
I wonder if someone could point me towards a more elegent solution than
what I"ve kluged together. I have a vector "samp1" of 296 integers.
They are sorted in ascending order and the numbers range from 177 to
228,953. I'd like to specify N non-overlapping intervals covering the
range from 0 to 229,354 and then for each range, count the number of
integers from samp1
2002 Nov 05
5
LaTeX Output?
Hello all,
Does anyone know of an R proc to export matrices or data frames (preferably
with row and column names) directly into LaTeX table output?
Many thanks,
Dan
daniel_ho at harvard.edu
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or
2001 Jul 12
0
Re: large survey data
> > Is there a way to import the data column by column? I have to analyze
> > the whole data, but only two variables at a time.
>
.....
>If you are on a unix box, and you have a tab delimited file, 'cut' will
>easily cut out fields from the file. To automate it, use a shell program
>to produce all the pairs you want. That is a 1980's solution but it should
2001 Nov 12
3
'subscript out of bounds' in matrices
Dear list
Having read through all the archives of the mailing lists, I've had no
luck finding the answer to my problem.
I am running a for(i in 1:n) loop and am creating a matrix, p, for each
of the n observations. This matrix p is a 2x1 matrix. I am then doing
the following:
diagp<-diag(c(p[1,1],p[2,1]))
to create a matrix with the elements of P on the diagonal (i.e. a 4x4
matrix).
2001 Nov 16
6
case conversion and/or string comparison
This is no doubt trivial but after searching the help files and the web, I
cannot seem to find it.
1) How do I convert 'hgt' into 'HGT' in R?
2) How should I have used the help facilities to find this?
At the end of the day, all I want to do is case insensitive string
matching... i.e. 'if ("HGT" == 'hgt') print('this should be true')'
I tried
2002 Jul 30
4
chisq.test, basic question
The cells are interpreted as counts, so by scaling you're analyzing a
different experiment (one with fewer observations). So the chi-squared value
will change (the terms (O-E)^2/E in the statistic scale linearly ignoring
rounding and "Yates' continuity correction").
The chisq.test on the original data is a test of association. Conventionally
you decide ahead of time on a
2002 Jan 27
1
DBM databases for R?
Hello!
Can I use DBM databases (as they are used in Perl) for the import of
large datasets in R?
Thanks in advance for your help,
Petra Steiner
-
---------------------------------------------------
Petra Steiner
Arbeitsbereich Linguistik
Universitaet Muenster
Huefferstrasse 27
48149 Muenster
2002 Jan 23
1
Posthoc tests for ANOVA
Dear List,
are there post-hoc tests like Scheffe, LSD, etc. available after ANOVA test
is performed with significant F-statistic?
I have tried
help.search("Scheffe"),
but "No documentation found" (and I have most of packages installed).
Probably there are such tests in R, and I am just searching badly...
My second question is: Which test/method I should use for ANOVA-like
2003 Apr 15
1
References of R in use (SHORT SUMMARY)
Dear R-list,
about one month back I posted here a question/idea that it would be nice to
have
some list of references of R in use plus some other "marketing" arguments
for R to promote it.
Thanks for all your responses.
I was given useful responses from Armin Roehrl, Jim Lemon, Edith Hodgen,
Ko-Kang Kevin Wang,
Charles Berry, Martin Maechler, Spencer Graves, Paul Gilbert, Adelchi
2006 Oct 04
0
new package proptest
Dear R users,
The package proptest (http://www.davidkraus.net/proptest/) has been
recently released to CRAN.
The package provides functions for testing the proportional hazards
assumption in the Cox model for right censored survival data. Two types of
tests for identifying nonproportional covariates are implemented:
* data-driven Neyman type smooth tests (using both nested and all-subsets