Changing LFC font size on Complex Heatmap

Question

[dylannicoembros]

I am having trouble with the font size of a complex heatmap. I created it as follow:

l2_val <- as.matrix(genes$log2FoldChange)
h2 <- Heatmap(l2_val,row_km = 10,row_names_gp = gpar(fontsize = 5),row_labels = genes$external_gene_name, 
        cluster_rows = F, name="logFC", top_annotation = ha, col = col_logFC,
        cell_fun = function(j, i, x, y, w, h, col) { # add text to each grid
          grid.text(round(l2_val[i, j],2), x, y)
        })

The result is the following:

How can I make the numbers smaller, so that they can fit in the cells?

Answer 1

[bk11]

Please change grid.text(round(l2_val[i, j],2), x, y) section of your code into grid.text(sprintf("%.1f", l2_val[i, j]), x, y, gp = gpar(fontsize = 20)). Your final code will be like this. I have not tried it though.

l2_val <- as.matrix(genes$log2FoldChange)
h2 <- Heatmap(l2_val,row_km = 10,row_names_gp = gpar(fontsize = 5),row_labels = genes$external_gene_name, 
        cluster_rows = F, name="logFC", top_annotation = ha, col = col_logFC,
        cell_fun = function(j, i, x, y, width, height, fill) { # add text to each grid
          grid.text(sprintf("%.1f", l2_val[i, j]), x, y, gp = gpar(fontsize = 20))
        })