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Hello, I am trying to draw the biplot of a PCA, but I would like to use another variable of my initial data frame than my "row.names" to assign labels to the points. A part of my R file follows ; "m" is my initial data frame, which has the variable "code" as row.names, and another variable "name" that I'd like to use as labels for the points. >

Hi, Excuse me for a so dummy question, but I really can't manage to do this very simple thing : I have a data frame, and I would like to calculate two vectors which contain the sums respectively of the rows and of the columns of the matrix. There is surely a very simple way to do that, but I didn't find it... Many thanks in advance.