library(gplots)
t <- read.table('output.txt', header = F, skip = 1)
rownames(t) <- t$V1
t <- t[, -1]
colnames(t) <- rownames(t)
heatmap(as.matrix(t), Rowv = NA, Colv = NA, col = colorpanel(100, 'blue', 'red'))
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