How to Create heatmap in R with post clustering information

Question

I have a data looks like this.

Genes                  Sample       cluster
1:      ARID1A         TCGA-2 cluster 1
2:        FAT1         TCGA-2 cluster 1
3:       KMT2C         TCGA-1 cluster 2
4:       KMT2C         TCGA-3 cluster 3
5:         ATM         TCGA-3 cluster 2
6:       KMT2D         TCGA-4 cluster 2

I am wondering is there any way to create a heat map of this kind of data in R. I already tried looking into pheatmap package but couldnot find any solution .

Answer 1

Here's a way to create a heatmap with ggplot2 from the data you shared:

library(ggplot2)

ggplot(df, aes(sample, genes, fill = factor(cluster))) +
  geom_raster() +
  coord_equal() +
  theme_minimal() +
  labs(fill = 'Cluster') +
  theme(legend.position = 'bottom')

^{Created on 2023-06-08 with reprex v2.0.2}