Is it possible to add spaces or separation between the squares using gheatmap?

[KevinLopezReyes]

Dear Dr. Guangchuang Yu,

I have a question, and I hope you can help me. Thank you.

I am trying to plot a heatmap on a phylogeny, but I want the squares representing my traits to be separated, not connected.

Here is an reproducible example

Load the libraries

library(ggtreeExtra)
library(ggplot2)
library(ggtree)

random data

set.seed(123)
tr <- rtree(5)

tip_ranges <- data.frame(row.names = tr$tip.label, Attribute1 = c("A", "B", "C", "A", "B"),
Attribute2 = c("High", "Low", "Medium", "High", "Medium"))

plot the tree

Fig_1 <- ggtree(tr) +
geom_tiplab()

Fig_1 <- gheatmap(Fig_1, tip_ranges, offset = 0.5, width = 0.5, font.size = 3,
colnames_angle = 0, hjust = 0.5, color = "black",
colnames_position = "top") +
scale_fill_manual(values = c("A" = "blue", "B" = "red", "C" = "green",
"High" = "gold", "Medium" = "lightgreen", "Low" = "gray")) +
theme(legend.position = "none")

print(Fig_1)