Displaying 13 results from an estimated 13 matches for "forestiers".
2004 Mar 02
2
Import range of cells from Excel
Dear all,
I would like to import a range of cells (e.g. F10:K234) from an Excel
worksheet to R. I have looked for documentation on RODBC and RDCOMClient but
I was not able to find enough information to solve my problem and all the
examples I have seen were dealing with an entire worksheet, not a range of
cells.
Thanks,
Jean-Noel
Jean-Noel Candau
INRA - Unit? de Recherches Foresti?res
2003 Sep 12
2
partial mantel
...s, in a community ecology analysis, I would like to calculate
the correlation between two dissimilarity matrices, controlling for a third
distance matrix representing geographical distances between sites.
Thanks!
Christophe Bouget
Biodiversité et gestion des forêts de plaine - Ecosylv
Ecosystèmes forestiers et paysages
Institut de recherches pour l'ingénierie de l'agriculture et de
l'environnement - CEMAGREF
Domaine des Barres
F-45 290 Nogent-sur-Vernisson
[[alternative HTML version deleted]]
2005 Jan 27
1
computing roots of bessel function
I am not yet a R user but I will be soon.
I am looking for the R command and syntax to compute the roots of Bessel
function i.e. computing the z values that lead to Jnu(z)=0 where J is a
Bessel function or order nu.
May You help me ?
thanks in advance.
Dr Catherine COUTAND
Institut National de la Recherche Agronomique (INRA)
umr Physiologie Int?grative de l'Arbre Fruitier et Forestier
2005 Nov 09
1
Replace missing values in spatial design using moving average
Dera R helpers,
I have a (x,y,z) data file where x and y are spatial coordinates and z a
variable. I have some missing values in the z column and I would like to
replace them with an optimized estimation from the neighbour cells. I could
not find any function in R to do that. Is anybody aware of such function ?
Maybe someone knows how to implement the Papadakis method in R...
Thanks for your
2004 Nov 15
1
help for nls
Hello,
I am beginning with R and I would like to test a non linear model. But I do
not find exactly wath I am looking for in nls packages (or I do not know
where to search).
I would like to try a model like this : y=b * x exp(n)/(a exp(n) + x exp
(n))
Where
a = a0 + a1z
b= b0 + b1z
x and z are variables
y the variable that I am trying to modelise
a0, a1, b0 and b1 are parameters to determine.
I
2003 Sep 15
1
User permissions on samba shared directories
Hi everybody,
I have successfully installed and configured Samba on my Aix box. I have setup domain security and mounted the machiine on the domain. I added a [homes] section and now everybody logging to their Windows 2000 workstations have access to their Aix home directory, what is great!
However, I have noticed by checking the home directory security for my user that there is THREE users |
2007 Aug 15
1
Problem Connecting to Oracle with R from Windows XP
Hello,
I installed RGui 2.5.1 and package DBI on Windows XP and tried to connect to Oracle database which is on a Linux server. When I tried to use dbDriver("Oracle"), I got an error as follows:
> drv <- dbDriver("Oracle")
Error in do.call(as.character(drvName), list(...)) :
could not find function "Oracle"
>
Could anyone tell me how
2011 Nov 03
2
optimising a loop
...lt;- wei2[i,]
+ }
But I expect it to be quite slow with my larger dataset.
Does any of you has an idea how I could remove the loop and speed up the operation?
Best regards,
Bastien Ferland-Raymond, M.Sc. Stat., M.Sc. Biol.
Division des orientations et projets sp?ciaux
Direction des inventaires forestiers
Minist?re des Ressources naturelles et de la Faune du Qu?bec
2004 Feb 09
2
Recursive partitioning with multicollinear variables
Dear all,
I would like to perform a regression tree analysis on a dataset with
multicollinear variables (as climate variables often are). The questions
that I am asking are:
1- Is there any particular statistical problem in using multicollinear
variables in a regression tree?
2- Multicollinear variables should appear as alternate splits. Would it be
more accurate to present these alternate
2013 May 22
1
column width in .dbf files using write.dbf ... to be continued
...ger(scale), as.character(DataTypes)))
It is explain here: http://stackoverflow.com/questions/2165342/r-calling-a-function-from-a-namespace
Sorry for the delay in my answer...
Bastien Ferland-Raymond, M.Sc. Stat., M.Sc. Biol.
Division des orientations et projets sp?ciaux
Direction des inventaires forestiers
Minist?re des Ressources naturelles
In reply to :
#####
Dear UseRs,
I did not have any answer to my previous message ("Is there a way to define "manually" columns width when using write.dbf function from the library foreign ?"), so I tried to modify write.dbf function to do wha...
2012 Dec 15
2
troubles reading a text file
Dear R experts,
For quite some time I have been trying to solve a mistery of reading a seemingly trouble-free text file. The data is temperature reconstruction arranged as a huge grid, preceded by seven "header lines" (which you see better if file is opened in Firefox or Chrome).
This is the data (gridded temperature reconstruction)
2001 Apr 05
1
No subject
R-helpers,
Beginner in R language, I have a problem to install a package (multiv) in R
for Windows 98 (R-Gui)
First I have got the multiv.zip file from the CRAN precompiled contributed
packages for Windows and put this file in C:/Program Files/rw1022.
in R-Gui I tried to install it as following
> install.packages("C:/Program Files/rw1022/multiv.zip")
I received the following
2003 Sep 15
2
problems setting a samba-server as a PDC(with win2k clients)
Hello experts,
I wanted to have my samba server working as a the PDC, so I followed all
the steps from the 'using samba' documentation.
My problem is when I try to configure the Win2000 client to log in to
the DOMAIN, i have an error.
it says 'unknon user, or incorrect password'
At least I know it found the DOMAIN because it prompted for a
user/password. And if I browse the