Pheatmap R greek letter in row annotation and legend

Question

[elisa.micarelli]

Hi, I'm trying to plot a Pheatmap with row annotation, I need to include greek letter in the annotation label both in the pheatmap and in the legend, but I wasn't able to do that.

I just modified the label in the pheatmap column with labels_cols parameter using the following command: expression(alpha~'column name'), but there is not the same parameter for annotation labels.

Do you have any idea how to include greek letter also in the annotation and legend? Thank you in advance. Elisa