similar to: (sans objet)

Is there a way to apply a function, say cor(), to each combination of some number of variables, and this, without using loops? For example, I have day, hour, var1 and var2. How could I compute cor(var1,var2) for each day*hour combination and obtain a matrix with day, hour and the cor value for each combination? Thanks for your time, Marc =================== Marc Bélisle Professeur adjoint

How do one dertermine the optimal number of rescaling cycles to use when performing DCA using the decorana function (library vegan)? Thanks for your time, Marc =================== Marc Bélisle Professeur adjoint Chaire de recherche du Canada en écologie spatiale et en écologie du paysage Département de biologie Université de Sherbrooke 2500 Boul. de l'Université Sherbrooke, Québec J1K 2R1

Hello, Is there an accepted way to convey, for regression trees, something akin to R-squared? I'm developing regression trees for a continuous y variable and I'd like to say how well they are doing. In particular, I'm analyzing the results of a simulation model having highly non-linear behavior, and asking what characteristics of the inputs are related to a particular

Dear gracious R community, I would like to produce charts of phytoplankton biomass changes through time. Each species has a line, and the biomass varies in mirror form along the line for each species along the X time axis. Here is an example of what I'd like to do: http://www.er.uqam.ca/nobel/r30240/Succession.jpg Any suggestions? Thanks David Bird UQAM, Montreal

http://surf.chimie.uqam.ca/~kruus/vorbis/ now contain branch_beta3 and trunk subdirs that are updated daily (until branch_beta3 becomes historical next week, like the other snapshots at that URL). to web-browse the source code, go to http://surf.chimie.uqam.ca/~kruus/vorbis/lxr/http/source erik (back after audio-video sync miniproject. Yay!) --- >8 ---- List archives:

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)

Artists and Developers Ally to Boost Open Source Graphics Software. Libre Graphics Meeting 2007 in Montréal. Announced 12 February, 2007 - Building on the overwhelming success of last year's Libre Graphics Meeting in Lyon, France, key Free/Libre and Open Source Software (FLOSS) graphics projects are pleased to announce the second Libre Graphics Meeting (LGM), to be held in Montréal, Québec,

Martin, You got some fine response already from other r-users. Indeed, centering explanatory variables is quite common and it really can have benefits in numerical accuracy. However one might also use centering for response variable and even standardization i.e. x - mean(x) / sd(x). This might increase the robustness of multivariate analysis, where variables have very different scales. For

dear R-users, I have to model counts where all counts above some threshold have been censored. In the same dataset I have too many zeroes for a Poisson or even a negative binomial distribution to make sense, so I would need a zero-inflated-censored negative binomial family for use in glmer (or glmmADMB?). That seems not to exist. my question is : how could I add a custom-built family of

Hello! Registration & Call for Proposals are now open for XDC 2019, which will take place at the Concordia University Conference Centre in Montréal, Canada on October 2-4, 2019. Thanks to LWN.net, this year we have a brand new website using the Indico platform, a fully open source event management tool! https://xdc2019.x.org If you plan on attending, please make sure to register as

Hello, The preliminary schedule for XDC 2019 has been published! https://xdc2019.x.org/event/5/timetable/#20191002.detailed XDC 2019 will take place at the Concordia University Conference Centre in Montréal, Canada on October 2-4, 2019. If you haven't already done so, now is the time to book your travel! In addition to publishing the schedule, the CfP for workshops has been reopened. If

I"m not sure, I just re-initiate the password and it is working now.. Au plaisir, Félix-Antoine Morin 769 Villeray Montréal, Qc. Canada H2R 1J2 (514) 690.36.89 felixantoinemorin.com Facebook <https://www.facebook.com/felixantoine.morin> 2018-04-25 16:14 GMT-04:00 Алекс <rominfo at i.ua>: > How to do it? > > 25.04.2018 14:33, Felix-Antoine Morin <antonixfelinski

Hola, me estoy crispando con un tema que no es la primera vez que he resuelto pero (extraamente) ahora no puedo resolver. Estoy instalando un paquete que no est disponible en la versin 4 de R: packageurl <- "http://cas.uqam.ca/pub/R/bin/macosx/el-capitan/contrib/3.6/CASdatasets_1.0-10.tgz" install.packages(packageurl, repos = NULL, dependencies = TRUE, type="source")

Hello, Just look at the examples in ?persp. There is a function called trans3d defined in it that will traduce your 3D coordinates to 2D, and so you will be able to draw lines with lines function. Romain. Corey Bradshaw a ??crit : >I've created a perspective plot using 'persp' in the graphics package. >I'd like to add a second plane of z values to the existing plot, but I

thank you Martin , but the problem now is that when I run " R CMD INSTALL -c SJava.tar .gz" I have the message " perl n'est pas reconnue en tant que command interne ou externe" [[alternative HTML version deleted]]

- Peut-on poser des questions en fran?ais? - Tr?s simple. Je fais un programme "truc.r" (sous emacs) Ce programme r?alise des graphiques. Je voudrais les enregistrer au fur et ? mesure -- sinon, quand la session est finie, ces graphiques sont perdus-- J'ai essay?: pdf("truc.pdf") Mais le fichier "truc.pdf" cr?? est vide. Comment fait-on? Merci et salutations

Dear developer, in my version of R (2.4.0) as weel as in a more recent version (2.6.0) on different computers, we found this problem : > a<-(58/40-1) > a [1] 0.45 > b<-(18/40) > b [1] 0.45 > a<b [1] TRUE > a==b [1] FALSE > Something seems wrong here. but if we do > c<-0.45 > d<-0.45 > c<d [1] FALSE then everything is ok. If we use 59

Dear users I have a problem with the dr function: "dimension reduction". I give you my example, and i'll be pleased to read your comments. #let be X a matrix 50*100: library(dr); X<- matrix(rnorm(50*100,5,1),50,100); #and let be Y a vector response: Y<- sample(0:1,50,replace=T); #I choose (for the expérience, but in reality i don't have it) a few variables #which are

#include <float.h> should define DBL_MIN and FLT_MIN, as well as DBL_MIN_EXP and FLT_MIN_EXP (such that 10eFLT_MIN_EXP is a valid float) This is a standard header file. But gcc now hides it away (mine was in /usr/lib/gcc-lib/i386-linux/<compiler-version>/include/ ) BTW - any corrections for my surf.chimie.uqam.ca/~kruus/vorbis/ stuff? Erik Kruus <kruus@on2.com> --- >8

How to do it? 25.04.2018 14:33, Felix-Antoine Morin <antonixfelinski at gmail.com> >Its okay now, it is working... ;) > > > Au plaisir, > Félix-Antoine Morin > > > 769 Villeray > Montréal, Qc. > Canada > H2R 1J2 > > (514) 690.36.89 > > felixantoinemorin.com > Facebook <https://www.facebook.com/felixantoine.morin> > >