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...es not occur with the same option on the postscript() driver as it can be observed by running: > postscript('exp.eps',colormodel='gray') > barplot(table(subset(iris,Petal.Width>1)$Species)) > dev.off() Any help is most appreciated. Luis Torgo -- Luis Torgo FEP/LIAAD - INESC Porto, LA Phone : (+351) 22 339 20 93 University of Porto Fax : (+351) 22 339 20 99 R. de Ceuta, 118, 6o email : ltorgo at liaad.up.pt 4050-190 PORTO - PORTUGAL WWW : http://www.liaad.up.pt/~ltorgo

Dear all, I have just found a 'good' tutorial R for datamining. I think it should be on the contributed docs. http://cran.r-project.org/other-docs.html Here is the link http://www.liaad.up.pt/~ltorgo/DataMiningWithR/ What do you think? Kind regards Christophe -- Christophe Dutang Ph. D. student at ISFA, Lyon, France website: http://dutangc.free.fr

I'm reading Torgo (2010) *Data Mining with R*<http://www.liaad.up.pt/~ltorgo/DataMiningWithR/code.html>in preparation for a class I'll be teaching next quarter. Here's an example that is very non-functional. > pH <- c(4.5,7,7.3,8.2,6.3) > names(pH) <- c('area1','area2','mud','dam','middle') >...

Hello! May you help me? I'm trying to do a contingency table using this > data(iris) > library(rpart) > modelo <- rpart(Species ~., iris) > prev <- predict(modelo, iris) Finally the contingency table > table(iris$Species, prev) But an error occurs: Error in table(iris$Species, prev) : all arguments must have the same length And I do not understand why, may you

...In addition, there are S3 and S3 category objects. Is there a good introductory description of how these are different from standard R objects and how they are different from each other? Also, how does one find out more about how objects are declared. For example, Data Mining with R<http://www.liaad.up.pt/~ltorgo/DataMiningWithR/code3.html>uses the quantmod package. I am used to Java's JavaDoc where one can see how classes are declared, what the instance variables and methods are, etc. I don't see anything similar for this package. How, for example, would one find out what the inst...

Good morning! I do not speak English very well and so I will try to explain the best I can. I have this: > tabela[,1] [1] a a b b a c b a c c c c c Levels: a b c >unique(tabela[,1]) [1] a b c Levels: a b c >var<-unique(tabela[,1])[1] > var [1] a Levels: a b c But if I concatenate like this > cat("VAR: ", var, "\n") I obtain >VAR: 1 and I

How can I join two lists? I have q1 and q2 and I want to merge them. I have tried to use the comand merge, but not work. Any solutions? Thanks! > q1 $Input1 7.84615384615385 0.5 $Input2 8.92307692307692 -3.2 $Input3 4.53846153846154 -5 > q2 $Input1 7.84615384615385 2 $Input2 8.92307692307692 -0.3125 $Input3

Good Morning! May you help me? I need to understand the function predict. I need to understand the algorithm implemented, the calculations associated. Where can I find this information? Thank You!

...to generate a bitmap output but I would like to use the computed result as an input for R to just draw the dendrogram. As I'm new to R any help is appreciated. Thanks, Risto ------------------------------ Message: 55 Date: Mon, 11 Feb 2008 09:14:52 +0000 From: Carla Rebelo <crebelo at liaad.up.pt> Subject: [R] The function predict To: r-help at R-project.org Message-ID: <47B0120C.1080204 at liaad.up.pt> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Good Morning! May you help me? I need to understand the function predict. I need to understand the algorithm imp...

Hello! I need some help, because I don't know how this error means: Error: variables ?Output1?, ?Output2?, ?Output3?, ?Output4?, ?Output5? were specified with different types from the fit Execution halted Can you help me? Thank You

Hello, How can I do a cross validation in R? Thank You!