Take a look at Mathematica or Maple. This is the kind of thing you do
with these languages.
Best,
Philippe Grosjean
Alberto Monteiro wrote:
Chris wrote:
Typically, people in the R community are not used to the spreadsheet
paradigm and need some time to be able to take advantage
it confusing. All the nice things you can do
with Excel will never save it for the time lost to understand what a
spreadsheet does (and thus, to debug it, or slightly change its
calculation).
Best,
Philippe Grosjean
Frank E Harrell Jr wrote:
Rolf Turner wrote:
On 30/08/2007, at 8:49 AM
49.110 248.454
... more than 4 minutes for your code.
By the way, what is your very fast machine, that is actually four
times faster than mine (gr!)?
Best,
Philippe Grosjean
..∞}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
As explained on the web page from where you downloaded SciViews 0.8-9,
this version is not compatible with R 2.5.0.
Best,
Philippe Grosjean
..∞}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology
on this!
Best,
Philippe Grosjean
..∞}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
For those who are interested, I just cook a little tcltkHelp() function
to ease access to the Tcl/Tk documentation under Windows. This is on the
Wiki discussion of the TkCommands help page at:
http://wiki.r-project.org/rwiki/doku.php?id=rdoc:tcltk:tkcommands
Best,
Philippe Grosjean
planctoniques.
J. Exp. Mar. Biol. Ecol., 4:619-632
Kendall, M.G., 1976. Time-series, 2nd ed. Charles Griffin Co, London
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology
The site is up again. This was a wrong manipulation. Sorry.
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
Hello,
The answer is in one page of the R Wiki (just created to address such a
question, by the way):
http://wiki.r-project.org/rwiki/doku.php?id=tips:data-manip:calc_on_two_tables
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
Hello,
I konw I have some corrections to do in svIDE,... I simply don't have
the time right now. Will try next week. Thank for reporting the problem.
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
gsub(^.*([[:alpha:]]).*$, \\1, vzor)
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
of the difficult cases for R 1.9.1 (for instance,
improvement of the algorithms for calculating autocorrelation, ANOVA,
linear regression or non linear regression)?
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
analysis, which uses the
Chi2 distance and is adapted to abundances (it is designed to analyze
contingency tables, but table of abundances, station versus species,
could be considered as such a double entry contingency table in a way).
Best,
Philippe Grosjean
Kind regards
Miltinho
Brazil
deserve a good
compilation on a wiki page and a redirection to it everytime the
question is asked.
Best,
Philippe Grosjean
--
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
( ( ( ( (
..
Dieter
1) Reduce the size of your sample (random or stratified subsampling),
2) Increase the memory of your computer available to R.
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical
something like that using a
Malahanobis distance, MDS, and then, stratified subsampling inside a
regular grid placed on top of the MDS plot.
Otherwise, I am not a specialist of unsupervised classification, and
other people here could have better suggestion.
Best,
Philippe Grosjean
2007/3/29
Hello,
If a least-square criterion is fine for you, you should use nls(). For
the logistic curve, you have a convenient self-starting model available:
SSlogis(). Look at:
?nls
?SSlogis
Best,
Philippe Grosjean
!
This is suboptimal, and I am considering rewriting it in PHP to return R
code only from the wiki server.
Best,
Philippe Grosjean
Gavin Simpson wrote:
On Sat, 2007-01-06 at 10:58 -0500, Gabor Grothendieck wrote:
The arguments to the functions can differ too even if they
exist on multiple
reported as unix? If yes, how do I make the difference?
Thanks,
Philippe Grosjean
__
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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide
extensions manual, and to start implementing your own R
package!
Best,
Philippe Grosjean
François Pinard wrote:
[Tong Wang]
I created environment mytoolbox by : mytoolbox -
new.env(parent=baseenv()). Is there anyway I put it in the search
path? In a project, I often write some small
You must specify starting conditions.
PhG
Ricardo Bessa wrote:
Hello, I’m with a problem in using nonlinear quantile regression, the
function nlrq.
I want to do a quantile regression o nonlinear function in the form
a*log(x)-b, the coefficients “a” and “b” is my objective. I try to use the
Hello,
You have a rather large list of editor that support R syntax
highlighting listed in: http://www.sciviews.org/_rgui/projects/Editors.html.
Best,
Philippe Grosjean
Dan Bebber wrote:
Jon,
are you using Windows? If so, try WinEdt with library(RWinEdt).
It has all the features you want
This question is regularly asked. Have a look at progress() in svMisc()
package (SciViews bundle).
Best,
Philippe Grosjean
Barry Rowlingson wrote:
Xiaofan Cao wrote:
Hi there,
I'm writing a program in R that has a few nested loops. I'd like to
monitor the progress when the program
that the periodic signal it extracts is of
frequence one.
Best,
Philippe Grosjean
I googled for an answer but I couldn t find any. Is it really
necessary to transform my zoo objects to ts? how can I fix the
frequency-problem.
I hope you can help me.
Thank you very much in advance and best
... still considering that your series is long
enough, which is probably the case for looking at weekly periodic
signals on a one-year long series.
Best,
Philippe Grosjean
to get there I now only took the zoo object x and made
x-as.ts(x)
x-ts(x, frequency=7) #to get 52 weeks(Periods
Ooops! Sorry, I send it only to Uwe Ligges the first time.
Best,
Philippe Grosjean
This is perhaps another solution, more elegant in the way the block
comment is written... but it requires to redefine `!` and slows it a
little bit because it tests first its arguments before calling
.Primitive
You should put your SQL query in a variable, and use this variable in
your call. Something like:
MyQuery - bla bla bla
MyQuery - paste(MyQuery, more bla bla)
#
doMyRequest(MyQuery)
Best,
Philippe Grosjean
Eric Fegraus wrote:
Hello,
I'm using R 2.3.1 on Windows.
I'm generating
x - c(1,2,3,4,2,3,3,1,2,3)
y - c(2,1,3,4,1,3,3,2,2,3)
table(x, y)
y
x 1 2 3 4
1 0 2 0 0
2 2 1 0 0
3 0 0 4 0
4 0 0 0 1
?table
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
decided to push
forward in Tinn-R, but there are other implementations out there. I
think that using a socket server is more reliable and it is also a
cross-platform solution. So, I would personnally prefer that solution.
Best,
Philippe Grosjean
__
R-help
... but the internal is completelly different!
Best,
Philippe Grosjean
Also if you are going to access DDE via COM or just COM also
check out the rcom package which is similar to RDCOMClient.
On 7/17/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
R and DDE (Dynamic Data Exchange)
Dear Rusers,
I run
acquisition of data through DDE under Windows would interest a couple of
users (including myself).
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
particulary to overwrite the counter i.
In package svMisc (SciViews bundle):
?progress
example(progress)
Best,
Philippe Grosjean
for(i in 1:header$M){
cat(Reading row: , i)
SparseIndex[[i]] - readBin( con, integer(), n=MIndexNumber[i], size=4 )
SparseSignal[[i]] - readBin( con
repeatedly, which is done
in progress() indeed.
Best,
Philippe Grosjean
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
, you could use something like:
grep(\n2:,try(parse(textConnection(ls))), silent = TRUE))
numeric(0)
grep(\n2:,try(parse(textConnection(ls()), silent = TRUE))
[1] 1
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe
and/or contribute to the development
of R2HTML if you want a solution that best fits your own needs in any case.
Best,
Philippe Grosjean
__
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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
that will scan an R script and do something like R2HTML. I
couldn't find anything like this as the svMisc package seems to have
disappeared.
No, it is still in the SciViews bundle. Tell me if you have problems
with it.
Best,
Philippe Grosjean
If anyone knows of something like this or is working
Wiki. Browse it to discover
how useful it can be for you.
There is also a mailing list dedicated to R Wiki developments:
R-SIG-WIKI (https://stat.ethz.ch/mailman/listinfo/r-sig-wiki).
On behalf of the R Wiki creators,
Philippe Grosjean
`
function(x) 1
attr(,bar)
[1] pow
Best,
Philippe Grosjean
Joseph Wang wrote:
I'm having problems with functions starting with underscores
'_foo' - function(x) {1}
seems to work
but I can't assign an attribute to this function
attr('_foo', 'bar') - 'pow'
Any way of doing
of June, as I don't have much free time for now.
Best,
Philippe Grosjean
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
version actuelle de R.
Bien à vous,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Belgium
manually
under R, everything worked fine. I was indeed not able to spot the
problem, but at least, I found a solution. Look at all required
libraries for Rcmdr in his DESCRIPTION file, and install them manually
(Packages - Install package(s)...).
Best,
Philippe Grosjean
John Fox wrote:
Dear
Hamilton, Ontario
Canada L8S 4M4
905-525-9140x23604
http://socserv.mcmaster.ca/jfox
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Philippe Grosjean
Sent: Tuesday, May 02, 2006 3:43 PM
To: John Fox
Cc: R-help
for (microchirurgical) propositions to
actualize the presentation of the R Web site, and I will follow the
decision of the R Core Team on this topic to make the R Wiki looking
similar.
Best,
Philippe Grosjean
Romain Francois wrote:
Dear R users and developpers,
My question is adressed to both of you
. After 14 hours continuous
programming on R, I think that everybody starts to present serious
troubles :-(
OK... back to work. I still have 3 or 4 hours to finish this $¤!§çà
program...
Philippe Grosjean
Jonathan Baron wrote:
I volunteer to attempt this, but only after I get my grades in
(May 8
, if you just need to access those data (no complex database
operations required) is SQLite. There is an R package to connect to such
a database without extra software needed. Thus, very convenient.
Best,
Philippe Grosjean
.
Perhaps is it not possible, or even, not desirable to get this result
for other situations.
Best,
philippe Grosjean
with the cursor on the 'd'. There is no longer a left-right divide
between system output and user input, as you can have output to the right
of user input. The previous
just curious about the solution you found.
Best regards,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Pentagone (3D08
David Smith wrote:
The GPL code is available as separately-downloaded packages for S-PLUS, as
has been done for many years. My own Oswald library for S-PLUS was published
under the GPL in 1997, for example, and many other authors produce
open-source libraries for S-PLUS under a variety of
See ?dir.create, and take care at the 'recursive' argument in case you
have to create several subdir levels at once.
Best,
Philippe Grosjean
Sarah Goslee wrote:
I think you need to use system(mkdir) or whatever is appropriate
for your OS. Making directories is a function of the OS, not of R
~~ ls()
||-
||Path ~~ search()
Note also that KSesnMain must point to a valid Tk window previously
constructed.
Best,
Philippe Grosjean
Keith Chamberlain wrote:
Dear List-mates,
I think the difficulty I'm having is localized to the MenuType() call made
from within MenuRead
devices at once.
On my todo list (but not for 2.3.0) is the possibility of setting a
default history length, perhaps defaulting to saving the last 2 or 3
pages.
That would be really great!
Philippe Grosjean
b) Scrolling up in RGui (windows 2000) to see past commands is nice
$hits, id1$hitspred) # H0 not rejected
ks.test(id2$hits, id2$hitspred) # H0 rejected
Best,
Philippe Grosjean
Kjetil Brinchmann Halvorsen wrote:
Andreas Neumann wrote:
Dear all,
I have hundreds of thousands of univariate time series of the form:
character seriesid, vector of Date, vector
Fred J. wrote:
Philippe Grosjean [EMAIL PROTECTED] wrote: What Fred is looking for is
local minima/maxima, also known as turning
points, or pits/peaks in a series. You can look at ?turnpoints in
pastecs library.
x - c(1:4,0:5, 4, 11)
x
[1] 1 2 3 4 0 1 2 3 4 5 4 11
package, you can do:
library(svWidgets)
tkWinAdd(MyTkWindow, title = Menu window, pos =-40+20)
MenuReadPackage(MyPackage)
... and you got all your menus configured at once (for MyTkWindows +
RGui console + RGui console popup menu
Best,
Philippe Grosjean
Please advise,
KeithC
to start doing it. There are
still many improvements to be done on the actual Tinn-R. For instance,
Jose-Claudio is currently working on nice Sweave extensions for Tinn-R.
Best,
Philippe Grosjean
Respecftully,
KeithC.
-Original Message-
From: Philippe Grosjean [mailto:[EMAIL
.
(actually, this function repeatedly uses \b which works on all system
tested (Linux console, RTerm, RGui, SciViews-R).
Best,
Philippe Grosjean
Duncan Murdoch wrote:
On 3/17/2006 9:44 AM, Jeffrey Racine wrote:
Hi, and thanks in advance for your time.
Background - I am working on a package and wish
with the original definition, even if 'e' or 'n' did not mean
anything special for my own use.
Ironically, doing a quick search on R, it appears that extract() is
defined only in pastecs library...
Best,
Philippe Grosjean
Martin Maechler wrote:
HenrikB == Henrik Bengtsson [EMAIL PROTECTED]
on Thu
This is really elementary indexing in S language:
matA[matB]
Best,
Philippe Grosjean
tom wright wrote:
Can someone please give me a pointer here.
I have two matrices
matA
A B C
1 5 2 4
2 2 4 3
3 1 2 4
matB
optimize this code. This is just a rough solution!
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Pentagone (3D08
to them).
I am a little bit lost. Could someone help me, please.
Best,
Philippe Grosjean
--
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut
, that is, the favored approach in S language.
Take care, however, that the optimal approach is not just to replace
for() loops with apply() and co, but to *rethink* completelly your
algorithm in a vectorized way. This often ends up with a very different
solution!
Best,
Philippe Grosjean
Gregor Gorjanc
Anyone who responds to Berton, please, CC me: I am also interested.
Best,
Philippe Grosjean
Berton Gunter wrote:
Folks:
A question for R users on Macs. AFAIK, R's Tcl/TK tools allow one to build
GUI interfaces to R's functionality across all platforms. My question: How
well do the TK
One solution is to convert an irregular time series into a regular one,
interpolating missing values. Obviously, it is only acceptable if the
number of missing items is low. See ?regul in pastecs, for instance.
Best,
Philippe Grosjean
alessandro carletti wrote:
Hi everybody,
I'm currently
-1.9b.Date_Last_change
)
If you really want a custom function for that, then, define:
multi.line.paste - function(str) gsub(\n, , str)
Best,
Philippe Grosjean
Lapointe, Pierre wrote:
Here's my contribution to R.
When R interacts with external programs (MySQL, cURL, etc.), it often
requires
(\, , paste(
SELECT *
FROM estimates3 a, newtable b
WHERE a.Ticker=b.Ticker
AND a.Fiscal_Year=b.Fiscal_Year
AND a.EPSb.EPS
AND a.Date_Last_change_or_conf-,variable,b.Date_Last_change_or_conf
, sep=))
Philippe Grosjean
__
R-help@stat.math.ethz.ch mailing
on these images to external programs, because R is not designed to
handle them efficiently.
Best,
Philippe Grosjean
Roger Bivand wrote:
On Thu, 9 Mar 2006, Christian Jost wrote:
Dear all,
I try to figure out how to use R to count the number of pixels of the
same color in some gray-level
?graphics.off is for graphic windows only. You don't tell us, but I
assume you are working with RGui under Windows. If you don't want many
help windows, you can still change it in Edit - GUI preferences -
Pager style - single window.
Best,
Philippe Grosjean
Uwe Ligges wrote:
Michael wrote
be eliminated on the mailing list. so, ask me if you need it).
Best,
Philippe Grosjean
P.S.: the formatting of text and tables in the views is managed through
CSS files, independently from Word styles. So, you would presumably like
to make a CSS file in accordance with the style you want in your
I have added several convenient methods for sending data directly from R
to Microsoft Word (report() function) in the svViews package (SciViews
bundle). However, I still have to upload it to CRAN. I do it right now.
It should be available in a couple of days.
Best,
Philippe Grosjean
Romain
set.seed(1)
R y - rnorm(500, 0, 1)
R z - rnorm(500, 0, 1)
R all(x == c(y,z))
[1] TRUE
Romain
Indeed! The pseudo-random number generator is initialized at the same
state, and thus, returns the same 1000 pseudo-random numbers in both
cases. So, no differences.
Best,
Philippe Grosjean
in if (seq[i] =
Sincerely,
Norman Goodacre
Please, read An Introduction to R provided with any version of R. The
correct syntax for an equality condition is ==, not =, so:
if (seq[i] == A)
Best,
Philippe Grosjean
__
R-help
R Wiki. This is the reson
why this email is so long: I took a good occasion to speak about code
optimization).
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology
See package svSocket in the SciViews bundle. It uses a socket server
written in tcltk and it is not blocking the command line.
Philippe Grosjean
pau carre wrote:
Hello, I tried to code a R socket server but I did not succeed.
The problem is that once the R socket server is created,
I call
there is IDEs that are better than Tinn-R.
Thanks a lot!
Please, submit a bug report to Tinn-R authors, if you want to see it
improved.
Best,
Philippe Grosjean
__
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https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do
Sorry Michael, but I don't understand your question.
If you want to intialize a constant matrix (there is not such thing in
R, just create a numerical matrix and use it without changing its
values), you just use matrix(). For help and arguments of the function,
type:
?matrix
Best,
Philippe
Hello,
Not exactly the same. By the way, why do you use do.call()? Couldn't you
do simply:
expand.grid(split(t(replicate(3, c(0, 1, NA))), 1:3))
Best,
Philippe Grosjean
Jacques VESLOT wrote:
this looks similar:
do.call(expand.grid,split(t(replicate(3,c(0,1,NA))),1:3))
Adrian DUSA
~ visual24, data = dats)
# Change style and color of the line (thanks to '...')
st(visual52 ~ visual24, data = dats, lty = 2, col = red)
Best,
Philippe Grosjean
Pryseley Assam wrote:
Hello R-users
I am new to R and trying to write some functions. I have problems writing
functions that takes
... that is, not the latest ones). I still have to upload
latest SciViews version compatible with both latest versions.
Best,
Philippe Grosjean
On 1/26/06, John Fox [EMAIL PROTECTED] wrote:
Dear Michael,
To elaborate slightly: You can't load the same package twice in an R
session. As mentioned, used Commander
Try:
data[lower.tri(data)]
(the same as data[col(data) row(data)], but using the dedicated function).
Best,
Philippe Grosjean
Christos Hatzis wrote:
Try
s - matrix(rnorm(36,0,1),nrow=6)
s[col(s)row(s)]
Courtesy of VR.
-Christos
-Original Message-
From: [EMAIL
)
formulaTransform(Form2)
plot(1:3, type = n)
text(2, 2, formulaTransform(Form2, TRUE))
# ... but this could be refined even more!
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology
I am afraid that you must be a little bit more verbose on your
problem. You do not provide enough information to spot your problem.
Best,
Philippe Grosjean
Michael wrote:
Hi all,
I successfully installed Rcmdr. And I type library(Rcmdr), nothing
happened;
or if I select menu item load
, then look at
http://www.sciviews.org/Tinn-R. That editor is definitely for you!
Best,
Philippe Grosjean
Thanks a lot!
On 1/25/06, Michael [EMAIL PROTECTED] wrote:
Hi all,
I am really new to the R language. I am a long time Matlab and C++ user
and I was forced to learn R because I am taking
, what did you decided to do during the next 30
milliseconds you will save by using crossprod() instead of x%*%y?
(joke)
Best,
Philippe Grosjean
P.S.: Uwe, perhaps you should consider buying a faster computer, isn't
it? :-()
Uwe Ligges wrote:
[EMAIL PROTECTED] wrote:
Hi,
x and y are (numeric
Best,
Philippe Grosjean
Michael wrote:
Hi all,
I am really new to the R language. I am a long time Matlab and C++ user and
I was forced to learn R because I am taking a statistics class.
I am seeking to reduce the learning curve to as smooth as possible.
Are there any addon/plug
Hello,
Well... the error message is explicit enough: number of items read is
not a multiple of the number of columns means that you do not have the
right number of items around line 11975 (not the same number as in the
11974 previous lines)! This is an error in you file.
Best,
Philippe
Just read more carefully the online help for paste (?paste).
You have:
sep: a character string to separate the terms.
and the default value for sep is (a space).
So, just use:
paste(test, 1, sep = )
Best,
Philippe Grosjean
r user wrote:
I am trying to combine the value of a variable
35 9.4 35 9.4
Vcells 3062785 23.49317558 71.1 9062793 69.2
# Less than 30 Mb used (with a peak at 80 Mb)
Isn't it manageable?
Best,
Philippe Grosjean
Gueorgui Kolev wrote:
Dear R experts,
Is it true that R generally cannot handle medium sized data sets(a
couple of hundreds
).
Best,
Philippe Grosjean
Thomas Kaliwe wrote:
Hi,
I've been looking for Image Processing packages. Thresholding, Edge
Filters, Dct, Segmentation, Restoration. I'm aware, that Octave, Matlab
etc. would be a good address but then I'm missing the statistical
power of R. Does anybody know
will look at this tomorrow.
Best,
Philippe Grosjean
Quoting Philippe Grosjean [EMAIL PROTECTED]:
Hello,
There are a couple of things for image processing in R (look at pixmap
and Rimage, for instance). However, R is *not* a good software for
processing images (nor is Matlab, Octave, IDL: they use
You could probably add:
- Fisheries modelling
- Oceanography
Although there is still resistance of other software there, R is gaining
more and more users in these fields.
Best,
Philippe Grosjean
P.S.: if you need actual examples, just ask... ;-)
John Maindonald wrote:
If anyone has a list
.
Best,
Philippe Grosjean
Achim Zeileis wrote:
On Mon, 23 Jan 2006 12:44:49 -0800 (PST) pat_primate (sent by
Nabble.com) wrote:
I know that this isn't really a R help question, but I am a
psychology student at TRU (tru.ca) and my psych department is going
to be switching statistical software
numeric* data in a data frame?
sapply(DF, median)
which considers the list and then simplifies the results down to a
vector or matrix,... or
apply(DF, 2, median)
which first convert into a matrix and then do the calculation on it?
Best,
Philippe Grosjean
I didn't understand the question
should be as
Andy proposes you, or, if you really want a colMedian function:
colMedian - function(x, na.rm = FALSE)
apply(x, 1, median, na.rm = na.rm)
Best,
Philippe Grosjean
Liaw, Andy wrote:
apply(x, 1, median) should do it. If not, you need to explain why.
Andy
-Original
is warmly welcome to
participate and to subscribe to R-sig-wiki. For the others, we will send
an announcement for the final R Wiki on this list when it will be ready.
Hereunder is a (rather long) summary of the discussion we had so far on
this topic.
Best,
Philippe Grosjean
and paste their ideas to
new pages in the Wiki.
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Pentagone (3D08
to the manipulation of a single data frame
(the so-called active dataset) + optionally one or two model objects.
Just look at all you can do just with one active data frame with R
Commander, and you will realize that it is perfectly manageable to learn
R that way.
Best,
Philippe Grosjean
Rau, Roland
paper...
Best,
Philippe
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
) ) ) ) )
( ( ( ( (Numerical Ecology of Aquatic Systems
) ) ) ) ) Mons-Hainaut University, Pentagone (3D08)
( ( ( ( (Academie Universitaire Wallonie
(the question was about last access
of an object, not about its creation date, so 'last-changed' is a better
attribute here). If you access the object directly with, let's say,
[EMAIL PROTECTED] - newvalue, that attribute is not updated, isn't it?
Best,
Philippe Grosjean
Martin Maechler, ETH Zurich
more than 50% of CPU use for RGui.exe. Thus, I
can imagine that, if you have a bi-processor hyperthreading config, it
could report only 25% of CPU use.
Best,
Philippe Grosjean
..°}))
) ) ) ) )
( ( ( ( (Prof. Philippe Grosjean
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