Then you can try: rownames(data.matrix) <- as.character(data.matrix$ProbeID) data.matrix <- data.matrix[-1]
as.matrix(apply(data.matrix1, 1, var)) or out <- apply(data.matrix1, 1, var) data.frame(ProbeID = names(out), Variance = unname(out)) Works for me On 02/03/2008, Keizer_71 <[EMAIL PROTECTED]> wrote: > > Hi Henrique, > > It is definitely better, but it doesn't show me the ProbeID which identify > the probes name > > Here was the result when i export to excel with your code. > > "Variance" > 1 2.425509867 21.6216446425273 > > > any suggestions? > > thanks, > Kei > > > Keizer_71 wrote: > > > > Hello, > > > > Thanks everyone for helping me with the previous queries. > > > > step 1: Here is the orginal data: short sample > > > > ProbeID Sample_1_D Sample_1_C Sample_2_D Sample_2_C > > 1 224588_at 2.425509867 11.34031409 11.46868531 11.75741478 > > > > step 2: i calculate the variance of the sample using this R code > > > > x<-1:20000 > > y<-2:141 > > data.matrix<-data.matrix(data[,y])#create data.matrix > > variableprobe<-apply(data.matrix[x,],1,var) > > > > step 3: however, when i type in variableprobe, it gives me this. > > > > 1 21.58257457 > > > > step 4: I need the code to output this: > > > > ProbeID Variance > > 1 224588_at 21.58257457 > > > > > > What do i need to do to modify the code to give me better description like > > the one above? > > > > thank. > > Keizer > > > > > > > > > > -- > View this message in context: > http://www.nabble.com/Variance-Calculation-in-R-tp15790621p15791115.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
