Thaks for your quick answer ! The problem comes from the VBAR statement computes statistics automatically. It seems impossible to make it graph stats that would have been already produced. I managed to do this in R, as in fact the barplot function doesn't compute the stats itself and accepts whatever table you put in... as for example my expected "column percent" table ! It worked very fine this way. But I'll check this TABLE statement you proposed ! Thanks again for the support !