Hi I was performing my work on GSE71416 and got the following kind of error. Can anyone please pinpoint what does this error mean..
> rmaData = rma(gse71416preset) Background correcting Normalizing Calculating Expression Warning message: package ‘hgu133plus2cdf’ was built under R version 2.15.1 > gse71416eset= exprs(rmaData) > groups = paste(pData(phenoData(gse71416dat[]))$characteristics_ch1.1,pData(phenoData(gse71416dat[]))$characteristics_ch1.2, sep=".") > groups[groups=="Gene expression from OAT_obese and non-diabetic subjects"]="control" > groups[groups=="Gene expression from OAT_obese and diabetic subjects"]="diabetic" > f = factor(groups, levels=c("control","diabetic"))
> design_gse71416 = model.matrix(~0+f) Warning message: In is.na(rows) : is.na() applied to non-(list or vector) of type 'NULL'
It'll be very helpful if anyone can help me to remove the error..