search for: forestiers

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

...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]]

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

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

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

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 |

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

...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

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

...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...

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)

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

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