@@ -14,7 +14,7 @@

 # -row_order order of genes. By default it is sorted by frequency of alterations decreasingly.

 #                            Set it to ``NULL`` if you don't want to set the order

 # -column_order order of samples. By default the order is calculated by the 'memo sort' method which can visualize

-#                                 the mutual exclusivity across genes.

+#                                 the mutual exclusivity across genes. Set it to ``NULL`` if you don't want to set the order

 # -show_column_names whether show column names

 # -pct_gp graphic paramters for percent row annotation

 # -axis_gp graphic paramters for axes

@@ -133,6 +133,7 @@ oncoPrint = function(mat, get_type = function(x) x,

 	count_matrix = apply(arr, c(1, 2), sum)

 	if(is.null(row_order)) row_order = seq_len(nrow(count_matrix))

+	if(is.null(column_order)) column_order = seq_len(ncol(count_matrix))

 	row_order = row_order

 	if(is.character(column_order)) {

 		column_order = structure(seq_len(dim(arr)[2]), names = dimnames(arr)[[2]])[column_order]