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how to plot one-dimeson heatmap using R

I am intersted in one perticular gene, and I want to see the correlation of this gene and other hundreds of genes, so I generate a one-dimension matrix like this:

geneA--interested_gene    0.86
geneB--interested_gene    0.23
........
geneZ--interested_gene    -0.15

How to plot heatmap using this data?

r heatmap
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updated by Alex Reynolds Alex Reynolds • written by szp770 • szp770

Please post the data and the code you tried.

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written by cpad0112 cpad0112

the example data is just like what I showed above, the first column is the genes name, and the second column is the correlation value of the gene in first column with the interested gene, I loaded this data in R and plot heatmap using pheatmap directly.

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written by szp770 • szp770

1 answer

Try this example:

# example data
set.seed(1); d <- data.frame(
  g1 = paste0("gene", 1:5),
  g2 = "myGene",
  cor = runif(5))

library(ggplot2)

ggplot(d, aes(g1, g2, fill = cor)) +
  geom_tile() + 
  theme_minimal()
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written by zx8754 zx8754

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