Displaying 20 results from an estimated 42 matches for "statisticiens".
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statisticians
2007 Apr 20
2
Udpate R under a proxy
dear all,
I get internet via a proxy server when I try to
downlaod package it always fail. Even when i add and
environnment variable for the http proxy server. I use
windows XP SP2
Sincerly
Justin BEM
El?ve Ing?nieur Statisticien Economiste
BP 294 Yaound?.
T?l (00237)9597295.
2001 May 09
1
Coding categorical -> dummy
Dear R-Users,
I have a data frame with several categorical variables. I want to create a
new data frame with dummy variables (with all levels).
I know the function model.matrix (see below) but it works only for one
categorical variable :
> tt <- c("a","a","b","a","c")
> tt <- factor(tt)
> model.matrix(~ tt - 1)
is there anyone who
2004 Jul 06
1
R & DataMining
...rn
Datamining or KDD (Knowledge Discovery in Database)
and if already exists a R package specialized in this
kind of analysis.
I found this contributes on the R web site:
[20] Diego Kuonen. Introduction au data mining avec R
: vers la reconqu??te du `knowledge discovery in
databases' par les statisticiens. Bulletin of the
Swiss Statistical Society, 40:3-7, 2001.
[ bib |
http://www.statoo.com/en/publications/2001.R.SSS.40/ ]
[21] Diego Kuonen and Reinhard Furrer. Data mining
avec R dans un monde libre. Flash Informatique Sp??cial
??t??, pages 45-50, sep 2001.
[ bib |
http://sawww.epfl.ch/SIC/SA/publ...
2005 Dec 28
2
Importing Genstat files into R
Does anyone know if there is a package or other method of reading Genstat
files directly into R. Genstat isn't listed in the foreign package.
Many thanks,
Graham
[[alternative HTML version deleted]]
2006 Dec 12
0
Re : Re : implementation of t.test
Excuses I have a mistake in previous mail
Type stats:::t.test.defaultThe formal way is to use getAnywhere(t.test)
Justin BEM
Elève Ingénieur Statisticien Economiste
BP 294 Yaoundé.
Tél (00237)9597295.
----- Message d'origine ----
De : justin bem <justin_bem@yahoo.fr>
À : Weiwei Shi <helprhelp@gmail.com>
Cc : R-help@stat.math.ethz.ch
Envoyé le : Mardi, 12 Décembre 2006,
2005 Aug 23
1
Problem with RCMD build ...
Hi
I have write A function to draw pyramid of age. I have two function
draw.pyramide(h,f,l) , pyramide(h,f,l) and a data frame with data.
I first use package.skeleton("pyra")
I got the package structure
Then in my shell I use
> RCMD build pyra
I get this :
check for description ... OK
....
removing junk files
but
"cannot open
2003 Dec 18
3
Summaries
Hello UseRs:
Excuses for my english.
I have a dataset with 65000 records and I'd like to make a summary where I
can view all the values (with the number of times that it repeats) that
there are each column of my dataset.
I tried with summary( ), str( ), but nothing gives me the result that I am
loking for.
Thank you very much.
2003 Feb 07
2
My remark on libraries
Hi R community,
These days, I am writing some functions to work with 2-ways frequency
tables ; you know all this tuff about measures of association: Chisq and
derived (phi, cramer's v), tau b, tau c, somer's d and so on.
So I consider all those functions could be gathered in a single R file, as
they are coherent and dealing with the same problem / objective (analysis
of crosstables).
2020 Mar 02
0
Postulation à la liste de diffusion
Bonjour, j'ai l'honneur de vous informer que je postule ? la liste de
diffusion pour des fins utiles de cette formation "MOOC".
Salutations ? toute l'?quipe d'encadrement.
Cordialement.
--
*DOUMBOUYA Moussa*
*Epid?miologiste bio statisticien*
**************************
Certifi? en FETP premi?re ligne en Guin?e
*Chef de section pr?vention et lutte contre la maladie*
2002 Oct 15
0
R2HTML package for R 1.6
Hello R communauty,
I have submitted to CRAN the package R2HTML.
The purpose of this package is twice:
- provide base HTML exportation functions. Basically, you will use them
exactly as a print function (or a cat(...file=)). Thus, making dynamic HTML
reports is possible.
- making live HTML output with frames and command, which is very usefull
for teaching purpose, as the student can keep a
2000 Apr 09
1
Paramtric ABC
Hi, I presently working with the bootstrap methodology. I am trying to establish confidence intervals using the parametric ABC method with the bivariate normal data. I looked at the paper written by DiCiccio and Efron and did not find any programming materials which was used in that paper. So I am in confuse how to aply bootstrap ABC parametric confidence intervals method.
I will be grateful to
2003 Mar 28
0
the chi-square test for trend / Correction
Hi (again),
Please find here a correction of the function I send previously
---------------------------------------------------------
tableChisqMH=function(x)
{
n=sum(x)
G2=(n-1)*(tablepearson(x)$estimate^2)
dll=1
p.value=1-pchisq(G2,dll)
out=list(estimate=G2,dll=dll,p.value=p.value,dim=dim(x),name="Mantel-Haenszel
Chi-square")
return(out)
}
2006 Dec 06
0
Re : stat question - not R question so ignore if not interested
For the first question x'(y-bx)<>0 or Cov(Ui,Xi)<>0 you have heterogeinity problem !
OLS estimator in this case in biased.
The bias is equal to (Exx')^{-1}Exu
You obtain obtain correct estimator by use instrumental variable or 2SLS ...
Justin BEM
Elève Ingénieur Statisticien Economiste
BP 294 Yaoundé.
Tél (00237)9597295.
----- Message d'origine ----
De
2006 Dec 08
0
Re : formula format for parameter estimation
see nlm or optim
Justin BEM
Elève Ingénieur Statisticien Economiste
BP 294 Yaoundé.
Tél (00237)9597295.
----- Message d'origine ----
De : Wayne Delport <wdelport@botzoo.uct.ac.za>
À : r-help@stat.math.ethz.ch
Envoyé le : Vendredi, 8 Décembre 2006, 8h27mn 44s
Objet : [R] formula format for parameter estimation
Hello, I am trying to input the following formula into R for parameter
2006 Dec 08
0
Re : A smal fitting problem...
May be you are also not familiar with statistic. the solution of
min \sum_{i=1}^{n} (y_{i}-b)^{2} is the mean. So the solution is
b<-mean(y)
Justin BEM
Elève Ingénieur Statisticien Economiste
BP 294 Yaoundé.
Tél (00237)9597295.
----- Message d'origine ----
De : Kåre Edvardsen <ked@nilu.no>
À : R-help <r-help@stat.math.ethz.ch>
Envoyé le : Vendredi, 8 Décembre 2006,
2006 Dec 12
0
Re : implementation of t.test
Try this
>stats.t.test.default
Best wishes.
Justin BEM
Elève Ingénieur Statisticien Economiste
BP 294 Yaoundé.
Tél (00237)9597295.
----- Message d'origine ----
De : Weiwei Shi <helprhelp@gmail.com>
À : r-devel-request@stat.math.ethz.ch
Cc : r-help <R-help@stat.math.ethz.ch>
Envoyé le : Mardi, 12 Décembre 2006, 1h05mn 46s
Objet : [R] implementation of t.test
Hi, there:
2007 Apr 25
1
for loops
Hello everybody
I'm very new at using R so probably this is a very stupid question.
I have a matrix of "p" columns and I have to calculate for each of them the "two sample t-statistic" and p-value and to save the results into two different vectors.
I have divided my matrix into two submatrices: submatrix A containing the first "n1" rows (p columns) and submatrix B
2008 May 20
1
quartz identify bug (PR#11491)
Full_Name: olivier
Version: 2.7.0
OS: mac os 10.5.2
Submission from: (NULL) (62.39.72.218)
Identify function does not work properly.
Esc button does not stop the process and R crashes. On qqplots graphic,
identify() does not find any points.
It is a serious problem, I can't identify points without crashing R now.
PS : Identify does not work on multiple graphics (par(mfrow=c(2,2))
2006 Nov 07
1
Re : Draw a circle with a given radius in an existing map
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2006 Oct 20
1
Where can I get the sweave package ?
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