On Nov 19, 2009, at 4:31 PM, Peng Yu wrote:
On Thu, Nov 19, 2009 at 4:27 PM, Marc Schwartz
wrote:
On Nov 20, 2009, at 10:21 AM, Peng Yu wrote:
There are a few version of apply() (e.g., lapply(), sapply()). I'm
wondering if there is one that does not return anything but just
silently
On Nov 19, 2009, at 9:28 PM, Yihui Xie wrote:
Hi all,
Suppose I have a formula: a = log(y) ~ x1 + I(x2^2)
How can I extract the original variable names 'y', 'x1', 'x2' from
this formula? Thanks a lot!
Regards,
Yihui
> all.vars(a)
[1] "y" &q
31" "2002-04-01" "2002-04-02" "2002-04-03"
[36] "2002-04-04" "2002-04-05" "2002-04-06" "2002-04-07" "2002-04-08"
[41] "2002-04-09" "2002-04-10" "2002-04-11" "2002-04-12&qu
ng IT's support,
presuming that your managers are in a position of influence with IT.
It would be difficult to provide detailed guidance to you without more
information on your specific environment, but hopefully the above
provides food for thought, at least in the abstract.
Ch
there are a plethora of GUI based clients for Subversion available
depending upon the operating systems you are using.
HTH,
Marc Schwartz
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gt; system or a new package.
>
> I hope my question was made more clear, and your answer will be much
> appreciated.
>
> Best,
> Tal
> On Sun, Nov 22, 2009 at 7:13 PM, Marc Schwartz
> wrote:
> On Nov 22, 2009, at 10:53 AM, Tal Galili wrote:
>
> Hello all,
Xcode is available for download here:
http://developer.apple.com/technology/xcode.html
As David noted, you do need to register, but it is free. Note also
that it is a 750 Mb download.
HTH,
Marc Schwartz
On Nov 22, 2009, at 3:11 PM, David Winsemius wrote:
On Nov 22, 2009, at 4:00 PM
the same errors as MS and OO.org, at least
in this narrow example.
Also, here are two additional Excel resources:
David Heiser's page: http://www.daheiser.info/excel/frontpage.html
Patrick Burns' Spreadsheet Addition:
http://www.burns-stat.com/pa
://www.omegahat.org/RDCOMClient/
See examples in the Introduction for that package.
HTH,
Marc Schwartz
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inging.
Would that be SAS1N1 and is there a vaccine that one can distribute to
universities and corporations to prevent the spread of the infection?
;-)
Regards,
Marc Schwartz
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ception
for 127.0.0.1.
..."
The Firefox configuration/preference dialogs are similar across OSs,
albeit on OSX they are at the top of the display rather than on the
Firefox application window frame as on other OSs. Here is link to the
Mozilla support site:
http://suppor
On Nov 23, 2009, at 7:13 PM, Tom Wainwright wrote:
On 11/23/2009 04:39 PM, Marc Schwartz wrote:
...
The proxy issue is referenced in ?tools::startDynamicHelp, which is
linked from ?help.start:
"Details
...
The browser in use does need to be able to connect to the loopback
inte
plot.ci = TRUE, ci.l = ci.l, ci.u = ci.u,
beside = TRUE, legend = legend, ylim = c(0, 200),
main = "Experiment X", ylab = "Total size",
font.main = 4, cex.axis = 1.2, cex.lab = 1.5,
cex.names = 1.5, plot.grid = TRUE)
BTW, once you get the plot
series of
contiguous and non-contiguous column names.
See ?subset
HTH,
Marc Schwartz
On Dec 5, 2009, at 10:43 AM, Ista Zahn wrote:
As baptiste noted, you can do
cor(pollute[ ,c("Pollution","Temp","Industry")]).
But
cor(pollute[,"Pollution":
tance.
HTH,
Marc Schwartz
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and provide commented, minimal, self-contained, reproducible code.
On Dec 5, 2009, at 11:34 AM, Marc Schwartz wrote:
On Dec 5, 2009, at 11:21 AM, Walther, Alexander wrote:
Dear List,
i have a question concerning these device-related function (i.e.
pdf(),jpeg(), etc.). Currently, I plot three graphs, one below the
other
into a /single/ window by using par
to extract the value within the parens in the regex
using a back reference.
Any characters from the beginning of the line to the '#' are dropped,
as are any characters after the numeric sequence to the end of the line.
See ?gsub for more information.
HTH,
Marc Schwartz
way that I can see to pass a vector of line
widths as the code is presently implemented.
You might want to look at the barchart() function in lattice to see if
there is more functionality there.
HTH,
Marc Schwartz
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;.' to
refer to all columns not otherwise already in the formula.
HTH,
Marc Schwartz
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(1, 4, 2, 6, 7))
[1] TRUE
> is.unsorted(sort(c(1, 4, 2, 6, 7)))
[1] FALSE
If you mean to test a factor to see if it is an ordered factor, then ?
is.ordered
> is.ordered(factor(letters))
[1] FALSE
> is.ordered(factor(letters, ordered = TRUE))
[1] TRUE
HT
AQ/R-FAQ.html#How-can-I-set-components-of-a-list-to-NULL_003f
HTH,
Marc Schwartz
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and provide comment
running a 64 bit version of R. What does:
.Machine$sizeof.pointer
show?
If it returns 4, then you are running a 32 bit version of R, which
cannot take advantage of your 64 bit platform. You should install a 64
bit version of R.
HTH,
Marc Schwartz
__
the first value in the vector.
c(-27,27)^(1/3)
[1] NaN 3
i'm using sign( c(-27,27) ) * abs( c(-27,27)) ^(1/3) ,
thanks
That seems to be a reasonable approach and if memory serves, has been
posted to the list previously.
HTH,
Marc Schwartz
_
dimnames")$Hair,
xaxt = "n", xlab = "")
text(colMeans(barplot_reference), par("usr")[3] - 0.09, srt = 45, adj
= 1,
labels = as.character(colnames(a)), xpd = TRUE, offset = 1,
col = "black")
HTH,
Marc Schwartz
___
;2009-01-01" "2008-12-01"
# Prior two years
> seq(as.Date("2009-02-01"), by = "-1 year", length = 3)[-1]
[1] "2008-02-01" "2007-02-01"
HTH,
Marc Schwartz
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On Dec 15, 2009, at 2:19 PM, Marc Schwartz wrote:
On Dec 15, 2009, at 1:39 PM, Megh wrote:
Dear all,
Please consider following date "as.Date("2009-02-01")". If I
subtract "1"
then it will give last day, similarly if I subtract "2" it will
give 2
)
...
You might also be interested in John Fox' web appendix on Cox models:
http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-cox-regression.pdf
HTH,
Marc Schwartz
On Dec 16, 2009, at 11:34 AM, tlum...@u.washington.edu wrote:
survival = exp(-hazard)
-thomas
On Wed
ame of an object, as C() is a function in
R. R will typically know the difference, but it is a good defensive
programming habit to avoid assigning objects to pre-existing function
names.
HTH,
Marc Schwartz
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ht
internally).
As a SAS user, on a more general level, you may find the following
book to be helpful in moving to R:
R for SAS and SPSS Users
Robert A. Muenchen
http://www.amazon.com/SAS-SPSS-Users-Statistics-Computing/dp/0387094172/
HTH,
Marc Schwartz
___
ration issue
to resolve.
BTW, we won't see the 'red highlighted text' here, as the list is
plain text only, not HTML or RTF.
Last, but not least, R version 2.10.1 is the currently supported
stable release of R.
HTH,
Marc Schwartz
___
t; s / (10 ^ (nchar(s) - 3))
[1] 110. 112.3210
See ?nchar
> nchar(s)
[1] 7 6
HTH,
Marc Schwartz
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functions in Thomas Lumley's 'rmeta' package on CRAN.
HTH,
Marc Schwartz
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
On Dec 21, 2009, at 4:13 PM, Ted Harding wrote:
On 21-Dec-09 21:19:27, Marc Schwartz wrote:
On Dec 21, 2009, at 2:54 PM, Rice, Terri wrote:
Hi,
I have the following table of odds ratios (or), lower limits(ll) and
upper limits(ul), which I would like to plot as horizontal lines
beginning at
e the references in ?residuals.glm for more information as per the
Details section therein.
HTH,
Marc Schwartz
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X1, df$X2), drop = TRUE)
> L
$A.1
X1 X2
1 A 1
$A.2
X1 X2
2 A 2
$B.3
X1 X2
3 B 3
$B.4
X1 X2
4 B 4
Is that what you want?
HTH,
Marc Schwartz
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PLEASE
vars <- unlist(strsplit(third, split = ", "))
> vars
[1] "first" "second"
> sapply(vars, get)
first second
4 6
> max(sapply(vars, get))
[1] 6
> sum(sapply(vars, get))
[1] 10
So, see ?as.formula and ?get. Also see ?paste and ?strsplit f
each column in your
data frame. Review each column and take note of any columns that
should be numeric, but are factors.
See ?str, ?grep and ?regex for more information. You might also want
to look at ?type.convert, which is the function used by the
read.table() family of functions to dete
definitely use a different mirror in the mean time.
HTH,
Marc Schwartz
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%"
Thank you,
Liviu
Presuming that you might want to output the results to a TeX file for
subsequent processing, where the '%' would otherwise be a comment
character, the key is not to get a single '\', but a double '\\', so
that you then get a single '\
14113 0.4668012 0.04420137
So there is a way to resize the space for printing so that
everything in
printed in one chunk.
Thanks in advance,
Adrian
See ?options and take note of 'width' which defaults to 80. Increase
that value to a number that suits your requirements.
HTH,
hat drive 'D' exists and that you have permission to write
to it, it is possible that there is insufficient room on that drive to
save 'data'.
Check on the above.
HTH,
Marc Schwartz
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http
egree rotation, see:
http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-can-I-create-rotated-axis-labels_003f
HTH,
Marc Schwartz
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PLEASE do read the posting guide http:
NA NA NA NA NA NA NA
NA NA NA NA NA NA NA
10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA
HTH,
Marc Schwartz
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
rc would be available from:
http://cran.r-project.org/src/contrib/Archive/drc/
I also found a Windows binary of the old package here:
http://cran.r-project.org/bin/windows/contrib/2.6/drc_1.4-2.zip
I have also copied Christian Ritz, the drc package author/m
d within the parens
# See ?regex
> gsub("^.* (.*)$", "\\1", x)
[1] "12:34:00" "1:14:00"
# Replace the characters up to the space with an empty vector
> gsub("^.* ", "", x)
[1] "12:34:00" "1:14:00"
HTH,
Marc Schw
27; Preview works quite well in place of Adobe
Reader, save for certain animations in PDF files. Also, for those
still reading this thread and are on OSX, if you are not aware, there
are additional plugins for QuickLook for EPS files and other such
things:
imum age for each of the remaining subjects:
> aggregate(d.new$age, list(id = d.new$id), min)
id x
1 1 5
2 2 7
3 3 12
Try that to see what sort of time reduction you observe.
HTH,
Marc Schwartz
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based R function to create Excel (XLS)
files from one or more data frames. Each data frame will be written to a
separate named worksheet in the Excel spreadsheet. The worksheet name
will
be the name of the data frame it contains or can be specified by the
user.
Author(s): Marc Schwartz
;Value'
section:
Non-integral numeric values are truncated towards zero (i.e.,
as.integer(x) equals trunc(x) there)
The output is correct, if confusing, but you are really using the
function in a fashion that is not intended.
HTH,
Marc Schwartz
_
hing that I can look into adding in
a future version, perhaps with some appropriate 'padding' in the
column width setting that would result in minimal wasted space.
HTH,
Marc Schwartz
On Jun 3, 2009, at 7:54 AM, Erich Neuwirth wrote:
If you are working on Windows and Excel instal
fashion. Essentially, iterate an operation over the
entire object with a single function call.
If you are coming from a different programming language, this is
perhaps one of the more challenging perspectives to achieve. But once
you make that leap, you will look back
On Jun 4, 2009, at 7:48 AM, jlfmssm wrote:
Does anyone know which package include the computation of Cochrans Q
statistic in R?
jlfmssm
See this thread:
https://stat.ethz.ch/pipermail/r-help/2006-September/113139.html
HTH,
Marc Schwartz
__
R
On Jun 4, 2009, at 12:56 PM, Brigid Mooney wrote:
Hi,
Is there an easy way to "catch" errors, in order to arrange for
r-scripts to exit gracefully?
I'm thinking of something along the lines of using is.na with an
if/else statement, but for errors.
Thanks!
See ?try and ?tryCa
gs(as.numeric(x))
if (any(!is.na(Result))) TRUE else FALSE
}
> NumCheck(c("a", "1", "c", "2"))
[1] TRUE
> NumCheck(letters[1:4])
[1] FALSE
> NumCheck(c("1", "2", "3", "4"))
[1] TRUE
Alter the in
, month, year), format = "%d/%m/
%Y")
[1] "2009-06-05"
Note that the above is now of Class 'Date':
> str(as.Date(sprintf("%02d/%02d/%4d", day, month, year), format =
"%d/%m/%Y"))
Class 'Date' num 14400
which then enables you to per
or Gorjanc, but the
information seems to be dated:
http://www.bfro.uni-lj.si/MR/ggorjan/software/R/index.html#tagCloud
I have cc'd him here for any updates.
Otherwise, there are some links on the Wikipedia page and some other
applications such as Wordle:
http://www.wordle.net/
HTH,
period, only at the beginning of the line". The caret
'^' defines the beginning of the line, so that a sequence of numbers
followed by a period in the middle of the line will not match.
HTH,
Marc Schwartz
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On Jun 8, 2009, at 12:34 PM, Marc Schwartz wrote:
On Jun 8, 2009, at 9:15 AM, Mark Heckmann wrote:
Hi,
i need to recognize itemization structures in strings which follow
the
format: "digit-digit-dot" like e.g.
1.
2.
19.
211.
Given the string " This happened in
s trying to think of a way to do this with only a single grep(),
but it has been too long of a day.
So here is a bit of a simplification on the two stage approach:
> vec
[1] "SHRT""5HRT""M1TCH" "M1TCH5"
"LONG3RS"
"One January 1. I saw Rick.* He was born in the 19. century.*"
which then makes the strsplit() parsing a bit easier. Since both
strsplit() and grep() use .Internal()s, hopefully this would still be
reasonably fast. Note that I have strsplit() split on the "*" possibly
follow
b3 NA
7 c1 NA
8 c 2 4
9 c3 NA
Note the 'all', 'all.x' and 'all.y' arguments...
HTH,
Marc Schwartz
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PLEASE
, there is a Fedora specific R e-mail list:
https://stat.ethz.ch/mailman/listinfo/r-sig-fedora
which you might want to subscribe to and then post future Fedora/RH
specific queries there.
HTH,
Marc Schwartz
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tical theory issue. See the
following R FAQ:
http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-are-p_002dvalues-not-displayed-when-using-lmer_0028_0029_003f
HTH,
Marc Schwartz
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ontains the two columns,
which can then be addressed as DF$x and DF$y. Further information is
available in the R manual An Introduction to R.
HTH,
Marc Schwartz
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PLEASE do
,14] [,15] [,16] [,17] [,18] [,19] [,20]
[1,] "G" "A" "W" "M" "M" "V" "U" "S"
[2,] "K" "J" "I" "P" "E" "R" "C" "K&q
On Jun 10, 2009, at 6:26 PM, Marc Schwartz wrote:
On Jun 10, 2009, at 12:36 PM, Logickle wrote:
Sorry, there may be some lingo for describing the extraction
problem I have,
but I don't know it.
I have a matrix of 2 rows and N columns, and a vector of N 1s and 2s.
Matrix M:
On Jun 10, 2009, at 7:05 PM, William Dunlap wrote:
Subscripting by a 2-column matrix
M[cbind(v, seq_len(ncol(M)))]
uses much less space (hence time) than making
the ncol(M) by ncol(M) intermediate matrix just
to extract its diagonal. E.g.
test <- function(n, seed) {
if (!missing(seed))
es the first '.' with a '*' allowing you to
split on the unique character. You can modify the replacement
character as your data may actually require.
HTH,
Marc Schwartz
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
12 TRUCK A
1412 TRUCK A
1512 TRUCK A
1612 TRUCK A
1712 TRUCK A
1812 TRUCK A
19 1 2 BUS F
HTH,
Marc Schwartz
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e and the
2.9.0 version is available from:
http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/2.9/
HTH,
Marc Schwartz
On Jun 11, 2009, at 12:57 PM, Henrik Bengtsson wrote:
Google "Rstem package" - first hit. It is hosted by the Omegahat
project. /H
On Thu, Jun 11, 2
ave not worked on SUSE, but check to see where gfortran is located:
$ which gfortran
and be sure that it returns the path to the executable and that the
path to it is in your $PATH.
You might also want to review:
http://cran.r-project.org/doc/manuals/R-admin
ion. Note that the presumption here is
that you want to output the numeric values to a formatted character
vector for display purposes, perhaps in a table, etc.
So if your actual data frame is called 'INP' and the column is called
'Size', you would use:
sprintf("
s gratefully accepted. Perhaps I've been looking
at it so
long I'm now missing the obvious! :)
Paul
Any ideas?
See ?par and take note of 'xaxs' and 'yaxs':
x <- 0:10
y <- 0:10
plot(x, y, xaxs = "i", yaxs = "i")
HTH,
Marc
\begin{centerfig}
...
\end{centerfig}
instead of:
\begin{figure}
\begin{center}
...
\end{center}
\end{figure}
HTH,
Marc Schwartz
\documentclass[10pt]{article}
\usepackage{graphicx}
\begin{document}
\setlength{\parindent}{0pt}
\setlength{\parskip}{0pt}
%% Here is the
o
20 'events' for each covariate degree of freedom in a logistic
regression model. With only 6 diseased (events) you really don't even
have enough data to support one covariate. The study, presuming an 'a
priori' design, is way underpowered for what you are attem
On Jun 15, 2009, at 10:13 AM, Paul Christoph Schröder wrote:
> Thanks Marc, as you said, this is a priori design. I'm trying to get
> more events.
> But for now, I'll have to try to get rid of the collinear genes. Is
> there any other method than using cor? Any method to state which
> genes
value to you. So there are
tradeoffs...
I have not compared Frank's lrm() function in the Design package
relative to any time savings in comparison to using glm() on large
datasets, but that may also be something to look into.
HTH,
Marc Schwartz
based R function to create Excel (XLS)
files from one or more data frames. Each data frame will be written to a
separate named worksheet in the Excel spreadsheet. The worksheet name
will
be the name of the data frame it contains or can be specified by the
user.
Author(s): Marc Schwartz
this is a step in any approach to variable
selection for subsequent model development...
HTH,
Marc Schwartz
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ops to do the job... But it's
really
taking too long... Any suggestions would be greatly appreciated.
Thank you!
Is this what you want?
> Vec
[1] "STAT1" "STAT1" "STAT1" "STAT1" "GAPDH" "G
1089 0.6915 2.4020 "
> write(capture.output(summary(x)), file = "")
Min. 1st Qu. MedianMean 3rd Qu.Max.
-2.2150 -0.4942 0.1139 0.1089 0.6915 2.4020
Note also that write() is a wrapper for cat(), thus you can get the
same by:
> cat(capture.output(summa
Alexandre did say 28 datasets, not 784 (28 * 28)
Thus, either:
mapply(rnorm, n = 500, mean = a1, sd = a2)
or
apply(cbind(a1, a2), 1, function(x) rnorm(500, x[1], x[2]))
HTH,
Marc Schwartz
On Jun 18, 2009, at 12:51 PM, Henrique Dallazuanna wrote:
Try this also:
a <- expand.g
'for' loops are doing. He is iterating through
all
combinations and would have created 784. So his problem statement
did not
match the code that he sent.
On Thu, Jun 18, 2009 at 2:12 PM, Marc Schwartz
wrote:
Alexandre did say 28 datasets, not 784 (28 * 28)
Thus, either:
ma
indicates that all variables not already in the
formula should be used.
See ?formula for more information.
HTH,
Marc Schwartz
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On Jun 19, 2009, at 10:25 AM, Alexandre Lockhart wrote:
My other question involved formatting my output. Normally, my text
file has 8 columns, each column with 500 values before the next 8
below are generated, and so on until 28 are reached. I have
examined formatting issues with each f
t/~lthompson221/Splusdiscrete2.pdf
HTH,
Marc Schwartz
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
es, then a
barplot is not the best approach for the display of summarized
continuous data. I would use a point plot with error bars/confidence
intervals. See the errbar() function in the Hmisc package or the
plotCI() or plotmeans() functions in gplots. You could also create
somethin
a funny scale (0, 13, 28...)
and what
I would like to do is to make that scale from 0 and then increasing
by 25 km
for a better interpretation (0, 25, 50...).
Hopefully my problem is more clear now, meanwhile I will have a look
to your
suggestions.
Thank you very much
Mafalda
2009/3/22
stance with the testing
of this package prior to release.
Thanks,
Marc Schwartz
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as a variable name.
See ?make.names for more information, which is noted in the
description of the 'check.names' argument in the read.table() family
of functions.
HTH,
Marc Schwartz
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d for Windows, OSX and Linux relative to options for installing
Perl and any missing modules.
The WriteXLS package is being maintained on R-Forge at:
https://r-forge.r-project.org/projects/writexls/
Regards,
Marc Schwartz
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I suspect that Gang was looking for something along the lines of:
> sum(2 ^ (which(as.logical(rev(nn))) - 1))
[1] 74
You might also want to look at the digitsBase() function in Martin's
sfsmisc package on CRAN.
HTH,
Marc Schwartz
On Apr 9, 2009, at 4:34 PM, Jorge Ivan Velez wrote
Longest", which results in an empty element in the resultant
vector. If you wanted to split on one or more spaces, you could use a
'regular expression' in strsplit() such as:
> strsplit(shadstr, " +")[[1]]
[1] "My"
.org/ffaq.html
and the formal spec is here:
http://www.ietf.org/rfc/rfc2646.txt
HTH,
Marc Schwartz
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PLEASE do read the posting guide http://www.R-project.org/posting-gui
http://cran.r-project.org/doc/FAQ/R-FAQ.html#Why-doesn_0027t-R-think-these-numbers-are-equal_003f
and call us in the morning.... :-)
HTH,
Marc Schwartz
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PLEASE do
4.5 1/1
6 6 5.1 0/0
7 7 6.3 1/1
8 8 NA 1/2
> str(DF)
'data.frame': 8 obs. of 3 variables:
$ ob: int 1 2 3 4 5 6 7 8
$ x1: num 1.1 2.1 3.2 NA 4.5 5.1 6.3 NA
$ y1: Factor w/ 4 levels "0/0","1/1","1/2",..: 2 3 4 1 2 1 2 3
This is now because:
06834326 0.78344182 -0.02085422 1.05896045 1.37631451
HTH,
Marc Schwartz
On Apr 19, 2009, at 12:22 PM, Jorge Ivan Velez wrote:
Dear Benny,
Here is something that could get you a hint:
# Some data
set.seed(123)
X <- matrix(rnorm(100),ncol=10)
Y <- matrix(rnorm(100,2,4),ncol=10)
# Number of
at:
http://r-forge.r-project.org/plugins/scmsvn/viewcvs.php/pkg/survival/man/bladder.Rd?root=survival&rev=11221&r1=11166&r2=11221
it was added in the last two months.
Petra, try either running update.packages() or installing R 2.9.0.
HTH,
Marc Schwartz
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1.369721e-16"
So it would appear that in the first R example above, the print()
function has changed in a material fashion.
HTH,
Marc Schwartz
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PLEASE do r
including stratified randomization, blocked
randomization, and adaptive randomization.
Thanks,
John
John,
Take a look at the 'blockrand' and 'crossdes' packages on CRAN.
If you need something beyond those, it is not overly difficult to
write functions in R to do this.
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