I would like to thank those who have responded and especially Brian
Ripley for making his unix tools for Windows available. A colleague has
also mentioned to me the set of unix tools called Cygwin.
Two things that can be done with R alone are to read the first n lines
of a file into n strings
Murray Jorgensen [EMAIL PROTECTED] wrote:
Large for my purposes means more than I really want to read
into memory which in turn means takes more than 30s. I'm at
home now and the file isn't so I'm not sure if the file is large
or not.
I repeat my earlier
Hi all,
I'm having trouble connecting to an oracle database using RODBC under
winXP. Unfortunately I can't really send a reproducable error as the
initial call to odbcConnect seems to hangs R and I have to kill the
session.
I have been using RODBC to sucessfully connect to an MS Access DB that
rterm --ess --save
works fine under both openssh and under putty SSH
clients. Thanks!
--- Prof Brian Ripley [EMAIL PROTECTED] wrote:
Date: Fri, 22 Aug 2003 19:41:35 +0100 (BST)
From: Prof Brian Ripley [EMAIL PROTECTED]
To: Bruce Moore [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
Subject: Re:
Scott Zeger [EMAIL PROTECTED] commented:
First, diamond graphs were developed as part of the Multi-center Aids
Cohort Study, a seminal study of HIV infection in the U.S. in which these
authors have been key co-investigators. The graphs were created to better
address
From: Richard A. O'Keefe [mailto:[EMAIL PROTECTED]
Murray Jorgensen [EMAIL PROTECTED] wrote:
Large for my purposes means more than I really want to read
into memory which in turn means takes more than 30s. I'm at
home now and the file isn't so I'm not sure if the file is
As some of the conversation has noted the 30 second mark as an arbitrary
benchmark I would also chime in that there is also an assumption that
any non-R related issues that impact upon being able to usefully use R
should be ignored. In the real world we can't always control everything
about our
On Tue, 26 Aug 2003, Patrick Connolly wrote:
On Mon, 25-Aug-2003 at 08:03AM +0100, Prof Brian Ripley wrote:
| On Mon, 25 Aug 2003, Patrick Connolly wrote:
|
| version
[...]
| However, what wasn't obvious to me was that it is necessary to specify
| what family to use. If no family
Hi,
are there any function to plot the empirical probability distribution
function? I just don't want to reinvent the wheel...
Best wishes,
Ott
--
Ott Toomet
PhD Student
Dept. of Economics
Århus University
Building 322
Universitetsparken
8000 Århus C
Denmark
otoomet (a) econ au dk
ph:
Hi R-people
I have a question concerning subsetting. I have a dataframe which contains among other
variables the variable subject. For each subject number there are several rows, e.g.:
subject treatment concentration day
19 a 15,4 1
19 a 18,3 2
19
Hi R-people
I have a question concerning subsetting. I have a dataframe which contains among other
variables the variable subject. For each subject number there are several rows, e.g.:
subject treatment concentration day
19 a 15,4 1
19 a 18,3 2
19
On Tuesday 26 August 2003 08:47, Ott Toomet wrote:
Hi,
are there any function to plot the empirical probability distribution
function? I just don't want to reinvent the wheel...
try this,
regards, Adelchi
--
n - 10
x - rnorm(n)
plot(c(min(x)-1,sort(x), max(x+1)), c(0:n,n)/n, type=s,
Ott Toomet wrote:
Hi,
are there any function to plot the empirical probability distribution
function? I just don't want to reinvent the wheel...
Best wishes,
Ott
See package stepfun.
Uwe Ligges
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[EMAIL PROTECTED] wrote:
Hi R-people
I have a question concerning subsetting. I have a dataframe which contains among other variables
the variable subject. For each subject number there are several rows, e.g.:
subject treatment concentration day
19 a 15,4 1
19
Ott == Ott Toomet [EMAIL PROTECTED]
on Tue, 26 Aug 2003 08:47:28 +0200 writes:
Ott Hi, are there any function to plot the empirical
Ott probability distribution function? I just don't want
Ott to reinvent the wheel...
As Uwe has already said, the standard stepfun package does
Hallo Toby,
Did you check the ODBC connection independently from R?
there is an Oracle tool for this (under Menu Network Administration).
I'm doing fine with a simpler call to odbcConnect:
channel -odbcConnect(MyDSN,uid=myuid,pwd=mypwd)
further parameters may not be necessary if you pay
This has been an interesting thread! My first reaction to Murray's
query was to think use standard Unix tools, especially awk, 'awk'
being a compact, fast, efficient program with great powers for
processing lines of data files (and in particular extracting,
subsetting and transforming
Hi Martin,
I don't know much about the concept of connection but I had supposed
it to at least include the concept of file and perhaps also input
device and output device'. I guess the important point that you are
making is that it is sequential in the sense that you describe. I
suppose at
A starting point might be the string splitting function strsplit
For example,
X = c(1,4,5 1,2,5 5,1,2)
strsplit(X)
[[1]]
[1] 1 4 5
[[2]]
[1] 1 2 5
[[3]]
[1] 5 1 2
This returns a list of the parsed vectors. Next you can do something
like:
Z = data.frame(matrix(unlist(X), nrow = 3, byrow=T))
On 26-Aug-03 Prof Brian Ripley wrote:
On Tue, 26 Aug 2003 [EMAIL PROTECTED] wrote:
[...]
X
[1] 1,4,5 1,2,5 5,1,2
Now my Question:
[...]
In other words, how to convert a vector of character strings, each
of which is in comma-separated format as above, into the rows of
a data-frame
(see archives for former discussion)
I probably didnt express myself very well in the last mail i wrote. The dataset
contains the variables subject, day, concentration(measured). I would like to
bootstrap the variable subject. Now it is true that the subjects wont be independent
in the
How can I specify the maximum number of iterations in coxph
whilst also specifying my model?? I can't find any on-line
examples. Thanks
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Hi,
I have been a happy user of R for windows for more than a year, however,
recently, I started using linux as my operating system and now I have
practically switched completely. Of course, I still use R with linux,
however, certain nice features of R in windows seem to be missing or
Dear Gareth,
?coxph.control (which we are told to check from ?coxph) contains an argument
for maxiter.
Best,
R.
On Tuesday 26 August 2003 13:51, Gareth Hughes wrote:
How can I specify the maximum number of iterations in coxph
whilst also specifying my model?? I can't find any on-line
Or
subset(nameofdataset, subject %in% c(15,19))
which does the right thing if subject should be missing (unlikely in
this
example I know, but likely to be a different story if conditioning on
concentration, say).
A pity subset() and transform() are not mentioned in the subsetting
section
of
Murray:
You said that you wanted more control over the selection of lines than
scan() was giving you. This may have been suggested by someone else
(there have been a lot of messages in this thread!), but I think what
you want to do is to roll your own reader, using textConnection.
For example,
On Tue, 26 Aug 2003 12:46:23 +0100, [EMAIL PROTECTED] wrote :
2. In windows, I could 'record' a graph, and then undo any changes made.
For example, if I misplaced a text label somewhere, I could go back and
place it again properly without having to re-plot everything again.
Can you post an
V I R U S A L E R T
Notre antivirus a trouvé le(s) virus
W32/[EMAIL PROTECTED]
dans votre mail vers le(s) destinataire(s) suivant(s):
- [EMAIL PROTECTED]
SVP, nettoyez votre système de tous ces virus avant de renvoyer ce mail.
Pour information, voici les
On 26 Aug 2003, Stefan [ISO-8859-1] Böhringer wrote:
How can I extract the linear discriminant functions resulting from a LDA
analysis?
The coefficients are listed as a result from the analysis but I have not
found a way to extract these programmatically. No refrences in the
archives were
Stefan,
I asked the same question last week. As Brian Ripley, its author, said then
(and others), the only way to see what's going on is to read the code. It's
pretty complicated statistically (that's why the performance is so good!),
many of the details are in chapter 2 of Pattern Recognition
On Tue, 26 Aug 2003 [EMAIL PROTECTED] wrote:
1. In windows, I could copy the contents of a window graphic's device as a
windows metafile, and then I could paste the metafile into OpenOffice draw.
The advantage of doing this is that I could then manipulate my graph as a
vector object and get
David Khabie-Zeitoune [EMAIL PROTECTED] writes:
For example,
X = c(1,4,5 1,2,5 5,1,2)
I think you meant
X = c(1,4,5, 1,2,5, 5,1,2)
A simpler approach is to use a textConnection which allows you to read
a vector of character strings as if they were lines in a file.
Hello all
I have a feeling this is very simple..but I am not sure how to do
it
My boss has two variables, one is an average of 4 numbers, the other is
an average of 3 of those numbers i.e
var1 = (X1 + X2 + X3 + X4)/4
var2 = (X1 + X2 + X3)/3
all of the X variables are supposed to be
Can I just check something? If I write some code in R to produce these
diamond graphs - I reckon 20-30 lines should do it - and post it to
R-help, have I broken the law if there's a patent on them? If I produce
these graphs using a pen, paper and my own artistic skill, will that
make me liable
Hi,
I use jpeg or png to export my graphs and I can edit them with the
gimp and add anything to them. I can then export them into several
formats, or open the jpeg file with openoffice.
As Thomas suggests you can also use xfig.
xfig can also export its graphs to many other formats.
see ?jpeg
and
On Tue, 2003-08-26 at 06:46, [EMAIL PROTECTED] wrote:
Hi,
I have been a happy user of R for windows for more than a year, however,
recently, I started using linux as my operating system and now I have
practically switched completely. Of course, I still use R with linux,
however,
Hello all
I have a feeling this is very simple..but I am not sure how to do
it
My boss has two variables, one is an average of 4 numbers, the other is
an average of 3 of those numbers i.e
var1 = (X1 + X2 + X3 + X4)/4
var2 = (X1 + X2 + X3)/3
Hello Peter, try the following:
On Tue, 2003-08-26 at 09:23, Barry Rowlingson wrote:
Can I just check something? If I write some code in R to produce these
diamond graphs - I reckon 20-30 lines should do it - and post it to
R-help, have I broken the law if there's a patent on them? If I produce
these graphs using a pen,
I know I should probably RTFM for this question, but could someone tell me
if R supports the idea of viewing source on any particular function you
want to use?
If I want to view source on the rpois() function, for example, can I do
somethink like:
source(rpois)
To see how the function is
I believe simple math stat calculations should be sufficient for this.
For simplicity, assume X1 through X4 are iid with mean m and variance v.
Note that
var1 = (3*var2 + x4) / 4
so
cov(var1, var2) = cov(var2, (3*var2 + x4)/4)
and since var2 and x4 are independent, this covariance can
Paul Meagher wrote:
If I want to view source on the rpois() function, for example, can I do
somethink like:
source(rpois)
To see how the function is implemented?
You mean you've never typed 'ls' instead of 'ls()' and discovered this
for yourself? I still do it all the time, and I've been
If I want to view source on the rpois() function, for example, can I do
somethink like:
source(rpois)
To see how the function is implemented?
Just type the name of the function
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Most of the time you just use
rpois
or, to use a pager,
page(rpois)
For some functions the function is hidden from the end user, and for those
(indeed, for any object the system can find) you can use
getAnywhere(foo.bar)
In your example, it will not be too revealing:
rpois
function (n,
On Tue, 26 Aug 2003, Paul Meagher wrote:
I know I should probably RTFM for this question, but could someone tell me
if R supports the idea of viewing source on any particular function you
want to use?
If I want to view source on the rpois() function, for example, can I do
somethink like:
Just type the name of the function to see the R code
rpois
function (n, lambda)
.Internal(rpois(n, lambda))
But in this case it tells you that rpois is implemented in C code :(
By convention, it is likely to be a function called do_rpois,
however in this case we have an exception
Helpers.
An instrument sends me data that is mostly nonlinear. I have a group of
functions to manipulate this data so that it is useful to the user. One
of them involves a nls model that called to fit a line to the data and
returns the fits. This works well 99 out of 100 times. Occasionally, the
Does anyone have a piece of code or know how I can use R to generate a table
of
critical values for the Mann-Whitney (aka Wilcoxon Rank Sum) test.
Ideally, I'd like a table that contains the critical values for any two
samples of size 3 through 30. I could use Monte Carlo simulation or the
See any good book on simulation: one from 1987 springs to mind.
The hard issue is to find a method that works near optimally for all
values of lambda, especially moderately large ones. No simple algorithm
does that, and for something like R, the issue is not compactness but good
worst-case
See ?qwilcox.
Andy
-Original Message-
From: Mark Lamias [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 26, 2003 2:56 PM
To: '[EMAIL PROTECTED]'
Cc: Mark Lamias
Subject: [R] Mann-Whitney U Table
Does anyone have a piece of code or know how I can use R to
generate a table of
Dear R-help:
Has anyone tried using R on the the AMD Opteron in either 64- or 32-bit
mode? If so, any good/bad experiences, comments, etc? We are considering
getting this hardware, and would like to know if R can run smoothly on such
a beast. Any comment much appreciated.
Best,
Andy
Andy
In trying to execute this line in R (Version 1.7.1 (2003-06-16), under
windows XP pro), with the randomForest library (about two weeks old) loaded,
the program crashed:
bost4rf - rfImpute(TargetDensity~.,data=bost4rf0)
Specifically, an XP dialog box popped up, saying R for windows GUI
front-end
Andy Bunn [EMAIL PROTECTED] writes:
Helpers.
An instrument sends me data that is mostly nonlinear. I have a group of
functions to manipulate this data so that it is useful to the user. One
of them involves a nls model that called to fit a line to the data and
returns the fits. This works
I've had a chance to build R-devel on one running SuSE (not sure which
release). confugure set things up for a 64-bit build that passed all
tests. The base tests ran about 25% faster on the 1.4GHz opteron than
a2GHz Xeon. That's as much as I know at this point.
luke
On Tue, 26 Aug 2003, Liaw,
Dave,
If possbile, please send me (privately) the data that caused the crash and
I'll have a look.
Andy
-Original Message-
From: David Parkhurst [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 26, 2003 3:37 PM
To: [EMAIL PROTECTED]
Subject: [R] rfImpute (for randomForest)
Hi All,
I am trying to match two character arrays (email lists) using either
pmatch(), match() or charmatch() functions. However the function is
missing some matches due to differences in the cases of some letters
between the two arrays. Is there any way to disable case sensitivity or is
there an
Dear all,
Is there any package for numerically calculating an integral? Thanks in
advance.
-Minghua
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On Tue, 26 Aug 2003, Paul Meagher wrote:
Personally, I would like to see a counting process implementation of an
poisson random number generator. I suspect it would be much slower than
rpois.c (because it would likely depend upon setting a num_frames iteration
counter) and less accurate,
On 26-Aug-03 Thomas Lumley wrote:
You can generate Poisson random numbers from a Poisson process like
this:
rfishy-function(lambda){
t - 0
i - -1
while(t=lambda){
t-t-log(runif(1))
i-i+1
}
return(i)
}
You can of course easily vectorise this:
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