Variance Calculation in R
Try this: write.table(cbind(data.matrix[1], Variance = apply(data.matrix[,-1], 1, var)), file='file.xls')
On 02/03/2008, Keizer_71 <christophe.lo at gmail.com> wrote:
sorry...in step 4-i need the R code to output in this format when i export to excel. ProbeID Variance 1 224588_at 21.58257457 thanks 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
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