[R] cluster package

2006-12-05 Thread Mahdi Osman
Hi list,

I am doing cluster analysis using the cluster package. I created a dendrogram 
using the function plot(agnes(myData)). When I try to change the sise of 
labels, it does not work. I tried cex = 1.5, etc. Nothing worked. Can anyone 
give me a hint on how to change the sise of the labels, as well as the sise of 
axes labels.

Thanks

Mahdi
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[R] cluster analysis of microarray data

2006-07-25 Thread Mahdi Osman
Hi list,

I am interested in cluster analysis of microarray data. The data was generated 
using cDNA method and a loop design.


I was wondering if any one has a suggestion about which package I can use to 
analyse such data.


Many thanks in advance

Mahdi
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[R] rbind

2006-04-06 Thread Mahdi Osman
Hi list,

I have been trying to pileup dataframes with different column names using
rbind. I am getting the following error message. I was wondering if there is
a way to go around this  minor problem?

Error in match.names(clabs, names(xi)) : names don't match previous names:
G

Thanks indeed for your information

Regards

Mahdi

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[R] malloc: vm_allocate(size=381886464) failed (error code=3)

2006-03-08 Thread Mahdi Osman
Hi all,

I am having memory allocation problem with my R 2.2.1 for Mac OS. The
following is the error message that I get. I do not get this message if I
break down the large dataset in to sub datasets. I think breaking up the
dataset is not a sustainable solution in the long run. The data that I am
analysing is essentially big, and it would be reasonable to do the analyis
on the whole dataset without even considering to partition it. So I was
really wondering if you could give me a clue about how to handle this
problem.

model6 -lm(logintens~ factor (slide) + factor(ind) + factor(dye) + 
factor(id)*factor(l6) + factor(rep)-1, data=sample_data2)

*** malloc: vm_allocate(size=381886464) failed (error code=3)
*** malloc[387]: error: Can't allocate region
*** malloc: vm_allocate(size=381886464) failed (error code=3)
*** malloc[387]: error: Can't allocate region
*** malloc: vm_allocate(size=381886464) failed (error code=3)
*** malloc[387]: error: Can't allocate region
*** malloc: vm_allocate(size=381886464) failed (error code=3)
*** malloc[387]: error: Can't allocate region
*** malloc: vm_allocate(size=381886464) failed (error code=3)
*** malloc[387]: error: Can't allocate region


Thanks for your help in advance

Regards

Mahdi

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[R] Memory problem

2006-03-02 Thread Mahdi Osman
Hi list,

I am analysing a large dataset using random coefficient (using nlme) and
fixed effects (using lm function) models. I   have problem with my R version
2. 2. 1 due to memory allocation difficulties. When I try to expand the
memory I get the following error message.


 R --min-vsize=1000 --max-vsize=10 --min-nsize=500
--max-nsize=1000
Error: target of assignment expands to non-language object
 R --min-vsize=1000 --max-vsize=5 --min-nsize=500
--max-nsize=1000
Error: target of assignment expands to non-language object


I am working on Mac OS X Power PC G5 platform.


I was wondering if anybody could give me a hint on how to solve this
problem.

Thanks in advance for your help


Regards

Mahdi

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[R] lme help

2006-02-08 Thread Mahdi Osman
Hi list,


I am fitting microarray data (intensity) model using the lme package in R
environment. I have 5 fixed variables in the model. One of the fixed
variables is genes. I am trying to get p-values for  different genes. But I
am getting only one p-value for all genes together. I can get a list of
p-value when I run lm. Why can't this work in lme?

My aim is to do multiple comaprison of all the genes that I have and I can
only do this if I have a list of their p-vales


I was wondering if you can help me solve this problem. That is getting
a list of p-value for each gene in the model using the lme.


Thanks in advance for your help


Regards



Mahdi 

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[R] lme question

2006-02-07 Thread Mahdi Osman
Hi list,


I am fitting microarray data (intensity) model using the lme package in R
environment. I have 5 fixed variables in the model. One of the fixed
variables is genes. I am trying to get p-values for  different genes. But I
am getting only one p-value for all genes together. I can get a list of
p-value when I run lm. Why can't this work in lme?


I was wondering if some one can help me solve this problem. That is getting
a list of p-value for each gene in the model using the lme.


Thanks in advance for your help


Regards



Mahdi

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[R] Xemacs

2005-11-28 Thread Mahdi Osman
Hi all,

How can I stop my xemacs from lauching R whenever it starts? I want to use
the usual M-x R instead. 

This is something I have to edit in the init file. 


Thanks

Mahdi

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[R] post hoc analysis after anova

2005-09-01 Thread Mahdi Osman
Dear list,

This is a simple question but I spent an hour on it without success. So I
sorry to bother you.

 I fit a linear model lm and then did anova. 


My idea is to run multiple pairwise comparision for  several factor
variables (f1, f2, f3, f4 each with its own levels, say 0, 1, 3 etc
)at the same time and get statistics for each factor's levels. The
statistics I want is just the basic one such as mean standard error.

I tried the pairwise.t.test, but I could not do what I wnated to.

I was wondering if anyone has idea about how I can accopmlish this task?


Thanks a lot for your tips and help


Greetings



Mahdi

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[R] R under suse linux 9.3

2005-07-07 Thread Mahdi Osman
Hi, dear list members, 
 
I've been using R under windows XP and I am now changing 
my system to SUSE LINUX 9.3. 
 
I could figure out that there is no precompiled version 
of R for LINUX. To get me going, I would like your help 
regarding what I need to setup R under my SUSE LINUX. 
 
Which compiler do I need to be able to compile the source 
and I was wondering if I could get GNU compiler? 
 
I highly appreciate your help and for taking your time. 
 
 
Looking forward to hearing from you 
 
Regards  
 
Mahdi 

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[R] glm

2005-06-01 Thread Mahdi Osman
Hi, list,

I have got a dataset on soil and plant. I would like to fit a glm to my
data. My response variable is percentage data. That is percent of plant root
length colonized by Arbuscular micorrhiza fungi. Because of the nature of my
data, I am not quite sure whether gamma or gaussian distribution is suitable
for this type of data. If I use gamma distribution, which link function is
appropriate?

I appreciate your suggestions very much.

Thanks in advance!


Mahdi


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[R] updating packages

2005-04-15 Thread Mahdi Osman
Dear list,

I have been trying to resolve the following problem for a couple of hours,
but couldn't get around. I updated my R pacages from CRAN which went
somoothly. However, updating HTML is not going well.

I got the following error message:

1: Package R2HTML is in use and will not be installed.

2: Number of rows of results is not a multiple of vector length (arg 1) in
cbind (pkgs, lib).

This happend after I configured my xemacs init to use xemacs as GUI for R.
The communication between my xamcs and R is going perfectly well and
fantastic.


I am wondering if anyone can give me a hint on why R2HTML is not updating
itself.

Thank you very much for your time and help



Regards

Mahdi

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[R] ESS

2005-03-08 Thread Mahdi Osman
Hi all,

I have got a dataframe in coma delimted text format. My ESS and R processes
are working well and active. I can read R help files and documentations from
inside ESS.

Can I perform anayltical operations such as (glm, plot ect) on elements of
my dataframe (variables) from within ESS? I could do these tasks directly in
Rconsole and would like to them in ESS directly.

How can I sumbit commandlines relevant to my datafrom to R?

Thanks for your help


Cheers

Mahdi

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[R] ESS

2005-03-03 Thread Mahdi Osman
Hi all,

I am running R 2.0.1 under Windows XP in German. I configured my path as
follows:

C:\Programme\R\rw2001\bin;C:\Programme\xemacs-packages\lib-src\;C:\Programme\XEmacs-21.4.13\i586-pc-win32

I can not start R proccess or ESS from within XEmacs. What is going wrong?

I can not start S. M-x S gives no matching

How can I configure XEmacs for STATA 8?

Thanks for your help.


M


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[R] sgeostat

2005-02-01 Thread Mahdi Osman
Hi, list,

I am using 'sgeostat' package by Albrecht Gebhardt and I am trying to put a
correlation coefficient of some kind on the lagplots. Is there a possiblity
to do so?

Thanks
Mahdi

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[R] sw

2005-01-26 Thread Mahdi Osman
Hi list,

I am just a new user of R.

How can I run stepwise regression in R?
Is there a graphic user interphase for any of the spatial packages inculded
in R, such as gstat, geoR and someothers. I am mainly interested interactive
variogram modelling and mapping.

Thanks
Mahdi

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