Displaying 20 results from an estimated 1000 matches similar to: "Chemoinformatic people"
2005 May 06
1
R for HTS data analysis
Hello,
I am looking for any packages, tutorials, documents,... about the use of R for the analysis of HTS data.
Thanks for your help
Fred
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2007 Jul 23
4
nnet 10-fold cross-validation
Hi
It clear that to do a classification with svm under 10-fold cross
validation one uses
svm(Xm, newlabs, type = "C-classification", kernel = "linear",cross =
10)
What corresponds to the nnet?
nnet(.....,cross=10)?
Regards
2005 Jul 12
2
what is the .Machine$double.xmin for a 64 bit machine?
I use a 32 bit machine. For those using 64 bit machines,
what is the .Machine$double.xmin for for machines?
regards. Stephen.
----- Original Message -----
From: Achim Zeileis <Achim.Zeileis at wu-wien.ac.at>
Date: Tuesday, July 12, 2005 10:51 am
Subject: Re: [R] exact values for p-values - more information.
> On Tue, 12 Jul 2005, S.O. Nyangoma wrote:
>
> > > If they
2005 Jan 14
3
summing subsets of rows matrices
I have a large data matrix (4460X3500) and I want to sum row subsets in groups of 10 (bin). Is there an efficient way to do this in R without using loops. Looping takes forever to perform this task!
For example suppose we have the matrix
> matrix(1:12,6,2)
[,1] [,2]
[1,] 1 7
[2,] 2 8
[3,] 3 9
[4,] 4 10
[5,] 5 11
[6,] 6 12
my problem is to sdum for
2004 Aug 08
2
manipulating strings
Hi
I have a called fil consisting of the following strings.
> fil
[1] " 102.2 639" " 104.2 224" " 105.1 1159" " 107.1 1148"
" 108.1 1376"
[6] " 109.2 1092" " 111.2 1238" " 112.2 349" " 113.1 1204"
" 114.1 537"
[11] " 115.0 303" " 116.1 490"
2006 Sep 19
0
R package for MALDI-TOF data pre-processing
Dear R user,
Is there any well-developed R package for pre-processing MALDI-TOF or
SELDI-TOF data besides PROcess? The package should be able to perform
denoising, baseline correction, normalization, spectrum
alignment/calibration, peak identification and binning. Thank you.
Deming Mi
2003 Sep 11
3
samba 3.0 with ldap / sambaSID
Hello,
I'm lloking for a way to convert my company's existing samba2.2 ldap
backed service to samba 3.0. What's particulary making me curious is the
sambaSID. As I've read it is the unique identifier of a PDC in the
windows world. So, how does samba3 generate this? Is it supposed to be
changed by the admin or is it determined by samba on the first startup?
Any pointer to a doc
2005 Aug 02
6
can we manage memory usage to increase speed?
Hi,
Thanks for reading.
I am running a process in R for microarray data analysis. RedHat Enterprise Linux 4, dual AMD CPU, 6G memory. However, the R process use only a total of <200M memory. And the CPU usage is total to ~110% for two. The program takes at least 2 weeks to run at the current speed. Is there some way we can increase the usage of CPUs and memories and speed up? Any
2005 Sep 13
3
where is eda library (Prof. Ripley's Exploratory Data Analysis Library)
Hi
I want to install eda library. Where can I download it?
I use R version 2.1.0 on Linux.
Thanks.
Stephen.
----- Original Message -----
From: Luis Ridao Cruz <Luisr at frs.fo>
Date: Tuesday, September 13, 2005 1:32 pm
Subject: Re: [R] How to erase objects
> ?rm
>
>
> >>> <v.schlecht at arcor.de> 13/09/2005 12:08:55 >>>
>
> Hi, I admit that
2005 Jul 11
4
exact values for p-values - more information.
Hi there,
If I do an lm, I get p-vlues as
p-value: < 2.2e-16
This is obtained from F =39540 with df1 = 1, df2 = 7025.
Suppose am interested in exact value such as
p-value = 1.6e-16 (note = and not <)
How do I go about it?
stephen
2016 Mar 04
3
vignette index
Dear helpers,
I have multiple vignette files for a package, and I would like to have the "right" order of these files when displayed online. For instance, see below:
https://cran.r-project.org/web/packages/bst/index.html
The order of vignette links on CRAN is different from what I hoped for:
> vignette(package="bst")
Vignettes in package 'bst':
pros
2007 Jun 18
2
data type for block data?
Dear All,
I have a matrix with data that is not organised. I would like to go
through this and extract it. Each feature has 2 vectors which express
the data. I also have an index of the places where the data should be cut.
eg.
>class(cc)
"matrix"
>cc
[,1] [,2]
[1,] 1 26
[2,] 2 27
[3,] 3 28
[4,] 4 29
[5,] 5 30
[6,] 6 31
[7,] 7 32
2006 Nov 29
3
better define: matrix comparison and cbind issue
Hello,
Sorry to all for the lack of communication, and thanks to those with the
suggestions.
So I have two matrixes which are different sizes, same column number but
different row number.
What I would like to do is to compare A to B. In the 6 and 9th column there
are ref numbers (molecular masses to be exact). I would like to check A and
B by these columns. If I find that the number in A[9,x]
2006 Aug 28
7
Time plots
Hello all and thank you,
I will try to make this as clear as I can. I have a matrix, at the
top of the matrix are 4 time points, the first col describes the sample,
then under each time point I have the intensity values of that sample.
So :
Samples 0 10 30 120 <- time
A 200 300 400 1000 <- data
B 100 400 200 100
C 500 400 200 1000
^
| samples
I would like to plot these however, all I
2006 Sep 29
1
linear gradient in nls
Hello,
I hope this doesn't turn into a statistics question but here I
go. I am using the nls function with a Gaussian distribution, see coding
below. When I run the nls I get an error back saying that I have a linear
gradient. I then, of course am unable to do anything else. The data that I
am using are intensity values from some mass spectrometry data. Is there
something I can
2007 Aug 28
4
Nodes & edges with similarity matrix
Hello,
I apologise if someone has already answered this but I searched and
googled but didn't find anything.
I have a matrix which gives me the similarity of each item to each
other. I would like to turn this matrix into something like what they
have in the graph package with the nodes and edges.
http://cran.r-project.org/doc/packages/graph.pdf . However I cannot find
a method to
2016 Mar 04
2
vignette index
I think the online order of vignette files are not based on vignette title or filename alphabetically. I am just curious: by what order these vignette files were displayed online so I can make changes accordingly?
Thanks,
Zhu
-----Original Message-----
From: Duncan Murdoch [mailto:murdoch.duncan at gmail.com]
Sent: Friday, March 04, 2016 10:47 AM
To: Wang, Zhu; r-devel at r-project.org
Subject:
2002 Jul 26
5
Is there a function for finding local extrema.
I have a vector with about 100.000 values representing a quite regular
function (sinusoid like).
I would like to find all local maxima of this function (should be about
4000). Is there a native routine for R?
Thanks in advance
Eryk.
--
_|_ \|/ \|/ Eryk Witold Wolski tel :0049-(0)30-8413-1543 w w
?v? 'v? \'v'/ MPI Moleculare Genetik fax :0049-(0)30-8413-1139 |
2007 May 25
1
3D plots with data.frame
Dear all,
Thank you for any help. I have a data.frame and would like to plot
it in 3D. I have tried wireframe() and cloud(), I got
scatterplot3d(xs)
Error: could not find function "scatterplot3d"
> wireframe(xs)
Error in wireframe(xs) : no applicable method for "wireframe"
> persp(x=x, y=y, z=xs)
Error in persp.default(x = x, y = y, z = xs) :
(list)
2007 Jan 19
3
if else statement
Hello,
I'm doing some scripting and I've noticed that R doesn't seem to
have an
if (cond){
do
}ifelse (cond) {
do
} else {
do
}
type block.
Is this correct or am I missing something.
THX
Paul
--
Research Technician
Mass Spectrometry
o The
/
o Scripps
\
o Research
/
o Institute