Displaying 20 results from an estimated 800 matches similar to: "(no subject)"
2004 Apr 02
1
which on array
Good morning !
Today I found a strange, for my poor knowledge of R, behaviour of
'which' on a matrix:
HAL9000> str(cluster.matrix)
num [1:227, 1:6300] 2 2 2 2 2 2 2 2 2 2 ...
HAL9000> class(cluster.matrix)
[1] "matrix"
HAL9000> ase <- cluster.matrix[1:5,1:5]
HAL9000> ase
[,1] [,2] [,3] [,4] [,5]
[1,] 2 2 2 0 -2
[2,] 2 2 2 0 -2
[3,]
2003 Apr 28
4
plot(pam.object) error with R-1.7.0 on Red-Hat 8.0 i686
I don't know if there is some fault in compiling or a bug of the new
R-1.7.0 version:
cl.pam.2 <- pam(as.dist(1-cor(mel.data)),2)
plot(cl.pam.2)
perform a right partitioning and silhouette plot on the old R-1.6.2
instead
"Error in clusplot.default(x$diss,...... ;
x is not numeric"
is the output on the new R-1.7.0.
Same platform: RH8.0 i686.
Some suggestions?
A.S.
2002 Nov 11
1
lines on class objects table
Hi dear R-list.
I would superimpose many lines of class 'table' over a plot(table.0,type
="l",...),
I tried 'lines(table.n,type="l",..)' but its behaviour is quite different
from those
of 'plot' :
>plot(table,type="l"...) # start graph from x = 0
>lines(table,type="l"...) # start graph from x = 1
Some sugestions? Thanks
2002 Oct 28
3
create an object list in a loop
Hi! Probably I perform this question because I did'nt still understand the
R-philosophy.
I have to build many matrix, with different dimensions, and I would to
assign them a
same 'prefix' name, i.e. "aval", but, obviuosly different suffix, something
like:
for (i in 1:n) {
aval%i% <- matrix(scan(data....),nrow=nr[i],ncol=nc[i]
...
}
where "%i%"
2002 Nov 04
3
write table and dinnames
I would write in tab-text file a table like this one:
TAB colname1 TAB colname2 TAB TAB... colnameN
rowname1 # # #
rowname2 # # #
rownameM # # #
then I wrote something like:
mymatrix <- matrix(nrow=M,ncol=N,byrow=T)
rownames(mymatrix) <- chvector1
colnames(mymatrix) <- chvector2
2002 Nov 06
2
chisq.test on a matrix
Hello!
What kind of calculation perform 'chisq.test', if its argument is a matrix?
Thanks for any suggestion!
------------------------------------------------------------
Sincerely yours.
Dr. Alessandro Semeria Tel. +39 544 536811
Models and Simulation Lab of Fax. +39 544
538663
The Environment Research Center - Montecatini
2002 Nov 20
1
regression
Look at 'lm' in the 'base' package for linear fit,
in the manual "An Introduction to R", distributed with R, page 55....
Best!
A. S.
----------------------------
Sincerely yours.
|------------------------------------+------------------------------------|
|Alessandro Semeria |Tel. +39 544 536811 |
2002 Oct 31
0
distributions homogeneity3
RE-Hello dear R-list!
I have to test if N (non linear) experimantal
distributions fit some of known one. I would proceed in this
way:
1. Fit with 'nlm' and e.g. power law one ( non outlier) distribution of
mine.
2. Perform 'chisq.test' for each pairs (power law ,distribution(i))
but I'm neither a statistician nor a skilled on R, so I ask you: ther'is
some other way, more
2004 Mar 12
1
access R remotely
This is not the right place for this question, but however:
when you connect to a remote machine with ssh
with a user name "user" you aren't able to
use the specific shell profile ($PATH,....) of "user", then you have to
specify the complete PATH of all command (i.e. /usr/local/bin/R).
Best
A.S.
----------------------------
Alessandro Semeria
Models and Simulations
2004 Nov 30
0
A basic question
On gentoo:
emerge R
and dowload,configuration, compilation of
all you need to working with base R is performed.
Best!
A.S.
----------------------------
Alessandro Semeria
Models and Simulations Laboratory
Montecatini Environmental Research Center (Edison Group),
Via Ciro Menotti 48,
48023 Marina di Ravenna (RA), Italy
Tel. +39 544 536811
Fax. +39 544 538663
E-mail:
2003 Jan 22
1
self-split plot on multiple device
Hello!
I would plot more than 10 (this number is always different)
graphics on a figure with layout like 'mfrow=c(4,2)'.
There is some existing function able to open the right number of
device if number of graphics is done or I have to build it myself
with some 'IF.....ELSE.....'?
Thanks.
A.S.
----------------------------
2004 Nov 11
5
expressions and paste
I have written a function to plot data which will be used for various different chemistries.
A simplified version is:
plot_data <- function(risk,levels,chem,sd2,measure){
plot(risk, levels,main=paste ("per", sd2, measure, "\n in usual", chem))
}
The problem is with the title.
This works fine if the variable "chem" is just text, but if it is an expression then
2003 Oct 23
7
generic algorithm
Dear all,
Is there any generic algorithm code for optimization implemented in R? I
searched without success.
Thanks,
--
Zhu Wang
Statistical Science Department
Southern Methodist University
Phone: (214)768-2453
Fax: (214)768-4035
Email: zhuw at mail.smu.edu
2004 Nov 02
4
Loadhistory problems
History files saved using nFile Save History do not open when using File Load History. I notice that when they are saved they do not seem to have a file extension and there is no option to chose an extension. Is this a problem. Other than this it seems so simple that I can't see what the problem is. I've tried using loadhistory and savehistory with the same problems. The syntax guide
2004 Feb 17
4
normality test
Hello,
I am analysing several samples whose sizes are from 9 to 110.
I would like to test their distribution with R,
whether they are normal or not.
I wonder which test for normality from R should I use .
Thank you for help.
Samuel
Samuel BERTRAND
Doctorant
Laboratoire de Biomecanique
LBM - ENSAM - CNRS UMR 8005
151, bd de l'Hopital
75013 PARIS
Tel. +33 (0) 1 44 24 64 53
Fax +33 (0) 1
2002 Dec 18
2
gene ontology association
Hello! I don't know if there is some R-package able
to associate ontology to a long list of GeneBank Name (a txt-tab file or
an XML file), i.e.
I would as output a formatted file with 4 columns (1:GeneBank Name
2,3,4:ontology).
I know that I have to perform a mapping of genes, I got a look on
AnnBuilder pkg,
but I 've not idea from where to start.
Some suggestion? Thanks in advance!
2002 Nov 01
2
Empirical distribution
If some can help to find under wich package can i find the commando's
wich i schould to use to work with the empirical cummulative (ecdf)
distribution and also the QQplot.
Zmarrou Hicham
Univesity of Amsterdam
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Send "info",
2003 Jan 21
2
running R inside of e-macs
I can''t start r inside of emacs. When I try it says that it cannot find .Rhistory and then it says " This program ( pressumably Rterm) has performed an illegal operation and will be shut down.". How can I fix this problem?
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2003 Mar 15
2
Help with reading data
everytime i try to read in data i get the following error:
Error in scan(file = file, what = what, sep = sep, quote = quote, dec = dec, :
line 3 did not have 5 elements
it was my understanding it wasn''t necessary to specifiy all defaults. The bizarre thing is this error comes from using read.table.
When I use scan I get the following error:
Error in
2003 Feb 06
2
.Rprofile, .Rfirst, and .Rdata
Hi all,
After a short hiatus away from R I have found that it's changed a bit.
I used to keep a definition of .First in .Rprofile that did a couple of
things on startup (load a couple of libraries). Now, I've discovered
that when I change the definition of .First in .Rprofile it doesn't
change anything when I start up, because .First is held over in .Rdata
from the last session.