@@ -7,6 +7,7 @@ CHANGES in VERSION 2.1.0

 * `densityHeatmap()`: `ylim` works as it is expected.

 * add `cluster_row_slices` and `cluster_column_slices` to `draw,HeatmapList-method()`

 * add `cluster_rows`/`cluster_columns` in `oncoPrint()`

+* legend labels support symbols

 ========================

@@ -373,7 +373,11 @@ discrete_legend_body = function(at, labels = at, nrow = NULL, ncol = 1, by_row =

 	# legend grid

 	gl = list()

 	for(i in 1:ncol) {

-		index = index_mat[, i][labels_mat[, i] != ""]

+		if(inherits(labels_mat[1, 1], "expression")) {

+			index = index_mat[, i][sapply(labels_mat[, i], function(x) x) != ""]

+		} else {

+			index = index_mat[, i][labels_mat[, i] != ""]

+		}

 		ni = length(index)

 		y = (0:(ni-1))*(grid_height)

 		y = legend_body_height - y