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...e2<-subset(table, extraction) return(table2) } myfunction(iris, extraction= Species=="setosa") ############## end What I would like is for this function to return exactly the same thing as : subset(iris, Species=="setosa") Thanks for your help. Regards, David Gouache

...ld almost be better for me) Anyways, I've been battling with gsub() and things of the sort, but I'm drowning in the regular expressions, despite a few hours of looking at Perl tutorials... So if anyone can help me out, it would be greatly appreciated!! In advance, thanks very much. David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...g to avoid having to open them one by one to convert them into a modern, directly usable format. So I was wondering if someone somewhere had encountered this and maybe had a way to read Multiplan files in R, or, at least, a way to read SYLK files directly in R. Any help appreciated. Thanks. David Gouache ARVALIS - Institut du v?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...you probably are well aware of this anyway. lmresults<-lapply(names(DF[,-1],function(.name) { lm(DF[,1] ~ DF[,.name], data=DF) }) This will run through each of the variables in the dataframe and regress the first column on each variable individually. On Wed, Feb 25, 2009 at 3:56 AM, GOUACHE David wrote: > Hello and thanks for your reply, but as you said, this is not really > what I'm trying to do. > My purpose is not one of variable selection within a model with > multiple predictors, but simply fitting a large number of models with > only one predictor. > I...

...ypical xyplot figure (for example the first from example(lattice) ) I would like to place the tick marks inside the panels instead of outside. I believe working with the axis argument might be the way to do it, but do not see how? Could anyone help me out in doing this? In advance thank you. David Gouache ARVALIS - Institut du v?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...y(df,list(df$factor1),fit.curve) I would like to add the 4 curves corresponding to these 4 fits to my graphic. The elegant way would be a custom panel function I suppose, but I haven't been able to write one up... Could someone help me out on this please? In advance thanks very much!!! David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...gth+Sepal.Width~Petal.Length+Petal.Width,data=iris,groups=Species,auto.key=list(space="right"),legend=list(bottom=list(fun=grid.text,args=list(label="youpi !")))) ### and sadly the my initial legend has disappeared... Any pointers ? Many thanks in advance for your help David Gouache ARVALIS - Institut du Végétal Service Génétique Physiologie et Protection des Plantes IBP - Université Paris Sud Rue de Noetzlin - Bât. 630 91405 - ORSAY CEDEX (Adresse Postale) 91190 - GIF SUR YVETTE (Adresse GPS, livraison) Tél : +33.(0)1.69.93.85.60 Port : +33.(0)6.86.08.94.32 Fax : +33.(0)1.69...

...35907 0 80 35908 6.716812458 81 35909 0 82 35910 6.796571531 84 35911 5.573668337 85 35912 5.42513958 86 35913 3.774513877 86 35914 0 87 35915 0 89 35916 0 90 35917 4.208252725 91 35918 0 92 35919 0 93 35920 0 95 35921 5.70023661 97 35922 0 98 35923 0 100 35924 0 102 35925 0 103 35926 0 104 David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...ame the factor levels contained in the Variable_Mesure.number columns of the original wide dataframe. What is this "inversion" due to ? If it is an error on my part, which I suppose it is, how do I correct this ? Thanls in advance. PS - I am running R 2.3.1 on a Windows platform David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...group=factor(rep(1:2,times=128/2))) bwplot(group~days,data=plouf) # doesn't work, whereas : bwplot(group~as.numeric(days),data=plouf) # does, but is obviously not good looking when it comes to axis legends... Is there a way to pull off a boxplot with dates ? In advance thank you. David Gouache ARVALIS - Institut du v?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...,strip=strip.custom(strip.names=c(T,F),strip.levels=c(F,T),var.name=c("Length","Width"))) but I get "Length" in both strips, which is obviously not my goal... Any pointers would be much appreciated as to how to achieve the desired result. Many thanks ! > David Gouache > ARVALIS - Institut du v?g?tal > Station de La Mini?re > 78280 Guyancourt > Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...xx)[c(1,3)]-0.35,c(87,87),paste(yy[c(2,4)]-yy[c(1,3)],"\nq/ha"),font=2) trellis.unfocus() But I would prefer doing this within a custom panel function so I can apply it more generally, and I haven't been able to figure out how... Could anyone give me a hand? Thanks in advance. David Gouache Arvalis - Institut du V?g?tal

Hello R-gurus, I'm trying to adjust different growth curves to a rather extensive dataset. I wrote up a function to go through all of them, but am encountering a problem : among the more than 1000 curves I have, obviously for some of them I encounter conversion problems. I'd like for my function to keep going to the next curve and store the fact that for curve number X I had a convergence

..."methods" "stats" "graphics" "grDevices" "utils" [7] "datasets" "base" other attached packages: RColorBrewer lattice "0.2-3" "0.14-17" Thanks in advance for your help. David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

...,"8901","8901","8901","6092", "8999","8999","8999","1002","1002","2490","2490","2700","2700","2720") test<-data.frame(vari=vari,pp=pp,nn=nn,loc=loc) David Gouache Arvalis - Institut du V?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

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...lot(object) to modify the default cutoffs that define the color changes on the polts ? I have tried the 'at' and 'cuts' arguments but to no avail. Thanks very much for your help. ATTENTION : ARVALIS La Minière a déménagé. Merci de prendre note de mes nouvelles coordonnées : David Gouache ARVALIS - Institut du Végétal Service Génétique Physiologie et Protection des Plantes IBP - Université Paris Sud Rue de Noetzlin - Bât. 630 91405 - ORSAY CEDEX (Adresse Postale) 91190 - GIF SUR YVETTE (Adresse GPS, livraison) Tél : +33.(0)1.69.93.85.60 Port : +33.(0)6.86.08.94.32 Fax : +33.(0)1.69...

...;l','p'), pch=c(NA, '|') ) Simply put, what I'd like to be able to do is change the strip names to include for example "a=-2","a=0","a=2" and "b=-1","b=-0.5","b=0.25" In advance thanks for helping. Cheers, David Gouache ARVALIS - Institut du Végétal Service Génétique Physiologie et Protection des Plantes IBP - Université Paris Sud Rue de Noetzlin - Bât. 630 91405 - ORSAY CEDEX (Adresse Postale) 91190 - GIF SUR YVETTE (Adresse GPS, livraison) Tél : +33.(0)1.69.93.85.60 Port : +33.(0)6.86.08.94.32 Fax : +33.(0)1.69...

...ram( as.formula(paste("~",paste(colnames(iris[,!sapply(iris,is.factor)]),collapse="+"))) ,data=iris[,!sapply(iris,is.factor)], scales=list(x=list(relation="free")) ) How can I individualize the x-axis and breaks for each individual panel? Thanks for any help. David Gouache ARVALIS - Institut du v?g?tal Station de La Mini?re 78280 Guyancourt Tel: 01.30.12.96.22 / Port: 06.86.08.94.32

Respected Sir, I am working on something in R. I am getting the following error. Warning messages:1: the standard deviation is zero in: cor(x, y, na.method, method == "kendall") I like to handle this error. I like to know how to do error handling in R. I want to write the WARNING MESSAGES to a text file and exit R. Please help me with a solution. My mailid is