I need to plot this matrix using ggplot
one two two one one two
one two one two two one
two one two two one two
So that one is a red square and two is a blue square. Essentially a grid with red and blue squares. How can I do this in R?
1 Answer
Given your matrix:
mat <- matrix(c("one", "two", "two", "one", "one", "two", "one", "two", "one", "two", "two", "one",
"two", "one", "two", "two", "one", "two"), nrow = 3, byrow = TRUE)
> mat
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] "one" "two" "two" "one" "one" "two"
[2,] "one" "two" "one" "two" "two" "one"
[3,] "two" "one" "two" "two" "one" "two"
you can build a dataframe
mat_df <- reshape2::melt(mat)
and then use ggplot2
ggplot(data = mat_df, aes(x = Var1, y = Var2, fill = value)) +
geom_tile()
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