Displaying 20 results from an estimated 52 matches for "biologique".
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biologiques
2004 Mar 24
7
binding vectors or matrix using their names
...uate
argument for cbind:
cbind(afunction(ncomma))
Is there in R a function that can do the job ? If not, how can I do it ??
Thanks in advance,
Sincerely.
St?phane DRAY
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D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
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Web...
2004 Sep 20
4
Multiple operations on list
...o not know how to "mix" the values in aa to obtain the desired values.
Is there a way to do it without for loop ?
Thanks in advances,
sincerely
St??phane DRAY
--------------------------------------------------------------------------------------------------
D??partement des Sciences Biologiques
Universit?? de Montr??al, C.P. 6128, succursale centre-ville
Montr??al, Qu??bec H3C 3J7, Canada
Tel : (514) 343-6111 poste 1233 Fax : (514) 343-2293
E-mail : stephane.dray at umontreal.ca
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2003 Nov 04
2
real eigenvectors
...are real ?
And what is the conditions to ensure that eigenvectors are real in the case
of an asymmetric matrix (if some conditions exist)?
Thanks in Advance,
St?phane DRAY
--------------------------------------------------------------------------------------------------
D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2004 Jul 06
2
Generate a matrix Q satisfying t(Q)%*%Q=Z and XQ=W
...solve the problem, or a reference on
this kind of question or the email of another list where I should ask this
question.
Thanks in advance,
Sincerely.
St??phane DRAY
--------------------------------------------------------------------------------------------------
D??partement des Sciences Biologiques
Universit?? de Montr??al, C.P. 6128, succursale centre-ville
Montr??al, Qu??bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2011 Jun 24
1
Model II regression
...RMA regression,
abline(lmodel2(x~y))does not do it.
If somebody knows how to do it, it would be a great relief !!
Best wishes,
JL
Jean-Louis Hemptinne
PR Ecologie et Didactique de l'Ecologie
Universit? de Toulouse - Ecole nationale de Formation agronomique
UMR CNRS 5174 Evolution et Diversit? biologique
BP 22687
F-31326 Castanet-Tolosan Cedex
Tel : (+33)0561753295
Fax : (+33)0561750309
2006 Feb 20
2
glmmPQL model selection
...ot
know how to make the model selection. Since the AIC and log-likelihood
are apparently meaningless, how can we select the parameters for a model
and compare the models to find which one fits best the data?
Thanks a lot
Emmanuelle Tastard
Emmanuelle TASTARD
UMR 5174 'Evolution et Diversité Biologique'
Université Paul Sabatier Bat 4R3
31062 TOULOUSE CEDEX 9 France
tel : 05 61 55 67 59
[[alternative HTML version deleted]]
2004 Feb 23
2
orthonormalization with weights
...the case of uniform weights, qr can do the
trick. I wonder if there is a way to do it in the case of non uniform
weights by qr or svd ?
Thanks in advances.
St?phane DRAY
--------------------------------------------------------------------------------------------------
D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2005 Jul 06
2
Problem with dyn.load...or else...
...does it says
that 'K_MEANSC' function is not in load table??? It then just stops at that
stage of the .R function.
Thank you all for your time,
Marie-Hélène
==========================================================
Marie-Hélène Ouellette
UNIVERSITE DE MONTRÉAL
Département de sciences biologiques
Tél. (514) 343-6111 poste 1233
=========================================================
[[alternative HTML version deleted]]
2007 Nov 30
1
formula substitution by its calculated value
..., substrate) = f_ox*(1-f_inox)
I want to replace f_ox*(1-f_inox) by 0.1
Further more, I can not manage to understand the formula type, which I guess would correspond to the kind of things I am dealing with.
Would you have any clue or insights on this?
Pascal Boisson
Assainissement - Traitement Biologique
Veolia Environnement - Centre de Recherche sur l'Eau
Anjou Recherche
Chemin de la Digue - BP 76
78603 Maisons Laffitte Cedex
Tel. :? +33 (0)1 34 93 81 44
Fax. : +33 (0)1 34 93 31 10
pascal.boisson at veolia.com
?
Please consider your environmental responsibility before printing this e-mail
___...
2004 Mar 31
3
scan seems to modify the data
...platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 1
minor 8.1
year 2003
month 11
day 21
language R
St?phane DRAY
--------------------------------------------------------------------------------------------------
D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2004 Jun 29
2
binding rows from different matrices
...uot; "o" "t" "y"
[15,] "E" "J" "O" "T" "Y"
>
Thanks in advance !
St??phane DRAY
--------------------------------------------------------------------------------------------------
D??partement des Sciences Biologiques
Universit?? de Montr??al, C.P. 6128, succursale centre-ville
Montr??al, Qu??bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2004 Feb 25
2
writing polygons/segments to shapefiles (.shp) or other ArCGIS compatible file
I am not sure a previous e-mail reached the list (no mail aknowledgement from R-boundle etc.). The question was how to write polygon
or segment coordinates into a shapefile set or any other ArcGIS supported format. The library shapefiles seems to do something but
the documentation is a bit beyond of my mind.... and I cannot get the meaning of the functions write**** and its application to the
case
2008 Aug 11
1
Unexpected parameter problem using rsaga.geoprocessor() {RSAGA}
...sing the RSAGA package provide some help in
telling me what I did wrong?
Thanks for your help,
Am?lie
--
--------------------------------------------------------------------------------------------------------------------------------
*Am?lie Lescro?l*
Postdoc - Seabird ecology
Centre d?Etudes Biologiques de Chiz? ? 79360 Villiers en Bois ? France
*_http://www.cebc.cnrs.fr/Fidentite/lescroel/lescroel.htm_*
*_http://www.cebc.cnrs.fr/ecomm/En_ecomm/En_index.html_*
*_http://www.penguinscience.com_* <http://www.penguinscience.com/>
--------------------------------------------------------------...
2004 Jan 01
1
ade4
Dear All,
I am using the scatter.dudi finction in the 'ade4' package to produce
correspondence analysis (nice) plots.
I do not seem to figure out how to plot the raw coordinates only -- or column
coordinates only. I would appreciate any help in doing that.
Here is the example I am following -- from the package.
data(banque)
> banque.acm <- dudi.acm(banque, scann = FALSE, nf =
2004 Feb 03
0
GEE
...t matures.
J'ai choisi d'utiliser les GEE pour repondre a ma question... est-ce le meilleur modele pour ca ? Si oui faut-il considerer les annees comme clusters ou bien les femelles ? comment specifier le "correlation link" ?
merci de votre aide
Laurent
Association TAKH
Station Biologique Tour du Valat
13200 ARLES
France
web site: www.tourduvalat.org
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2004 Feb 07
1
Adding a color bar to image
How can I add a color bar to show the color scales to
what is generated by image(), similar to the one in
figures generated by filled.contour()?
Thanks.
Y. C. Tao
2004 Mar 16
2
bray-curtis?
Does R have a function to calculate Bray-Curtis distance measures, which is
probably one of the most frequently used and recommended dissimilarity
measures in ecology? It isn't mentioned in dist().
2004 Mar 22
1
Débutant R
Bonjour à tous,
Je débute dans l'utilisation de R, et suis à la recherche de toute piste me permettant l'introduction à ce logiciel.
J'ai pour le moment la fiche d'Emmanuel Paradis: "R pour les débutants", mais j'aimerais savoir où je peut trouver
d'autres documentations notamment pour le traitement statistique de données (Anova, modèle linéaire et
modèle
2004 Mar 25
0
Problems with environments, I think..
...ead
the previous discussion on this list "do.call and environment") but can not
find how to solve it.
Hope that somebody can help me,
Sincerely.
St?phane DRAY
--------------------------------------------------------------------------------------------------
D?partement des Sciences Biologiques
Universit? de Montr?al, C.P. 6128, succursale centre-ville
Montr?al, Qu?bec H3C 3J7, Canada
Tel : 514 343 6111 poste 1233
E-mail : stephane.dray at umontreal.ca
--------------------------------------------------------------------------------------------------
Web...
2004 Apr 29
1
problem with pca
Hello
I have some kind of problem with R.
I want to do a pca (I work on R and ade4 library) but R doesn't wan to
realize my pca because of my data:
I have some binary variable (presence/absence of birds, hole, vegetals...)
and metric variable (cliff 's size...) and each time I have an error message
because of the mix of the 2 type of variable.
So, what can I do?
Famille SALMON