Dear All, After completing an analysis using LIMMA. I created a file containing all the genes that had a p value < 0.05. In the file there were a few spots that contained an "NA" for the block, row, column and ID fields but there are values under the M, A, T,p and B fields . The input is a GPR file. The format of the same is Block Row Column Name ID(followed by parameters eg. log2(cy5/cy3) Why are the values for block row and column not being shown in the output? I have a set of significantly expressed genes in the output but without a name or location of the spot. Eagerly waiting for a reply, Thank you -Ankit