search for: colmns

dear all, I am a student in cs college. I would like to know how to plot infinte number of genes after using the svm. the data set i have consists of x which is a matrix of 39 cancer patients [rows] and 2000 gene names [colmns]. each cell is the value of the gene for a particular patient. there are two types of cancer people representedas factor y. here is the code: library(e1071) #load database db <- read.csv(file="databases\\colon-cancer\\colon-cancer.csv",head=FALSE,sep=",") x = as.matrix(db...

Hi users I'm student who is struggling with basic R programming. Would you please help me with this problem. "My english is bad" I hope that my question is clear: I have a matrix in wich there are two colmns( yp, yt) Yp: predicted values from my model. yt: true values ( my dependante variable y is a categorical;3 modalities (0,1,2) I don't know how to procede to calculate the misclassification rate and the error Types. Thank you for answring Doussa -- View this message in context: http://r.78969...

...r2==2009$var2[i],FUN=mean). The problem is that 2008$var2 and 2009$var2 contain both 20 levels each but only 18 of them are shared. So for those 18 I need to find the result that I`d get applying the above formula (which in any case doesnt work if the levels are not identical in the two data frames colmns) and for those two different levels in 2009$var2 to use the average of the whole column 2008$var2. Anybody has some ideas? Please help me... Hope it`s clear enough what I need. Thanks! alberto -- View this message in context: http://r.789695.n4.nabble.com/conditional-mean-between-two-data-frames-...

Hi, I'd like to download some data files from a remote server, the problem here is that some of the files actually don't exist, which I don't know before try. Just wondering if a function in R could tell me if a file exists on a remote server? I searched this mailing list and after read severals mails, still clueless. Any help will be highly appreciated. B.C.