CODEWITHSUNDEEP
rplot
hora
hora

Reputation: 855

How to plot matrix with background color varying according to entry?

I wanted to ask for any general idea about plotting this kind of plot in R which can compare for example the overlaps of different methods listed on the horizontal and vertical side of the plot? Any sample code or something

Many thanks enter image description here

Upvotes: 1

Views: 564

Answers (2)

Greg Snow
Greg Snow

Reputation: 49640

The corrplot package and corrplot function in that package will create plots similar to what you show above, that may do what you want or give you a starting point.

If you want more control then you could plot the colors using the image function, then use the text function to add the numbers. You can either create the margins large enough to place the text in the margins, see the axis function for the common way to add text labels in the margin. Or you could leave enough space internally (maybe use rasterImage instead of image) and use text to do the labelling. Look at the xpd argument to par if you want to add the lines and the grconvertX and grconvertY functions to help with the coordinates of the line segents.

Upvotes: 1

EDi
EDi

Reputation: 13280

A ggplot2-example:

# data generation
df <- matrix(runif(25), nrow = 5)
# bring data to long format
require(reshape2)
dfm <- melt(df)
# plot
require(ggplot2)
ggplot(dfm, aes(x = Var1, y = Var2)) +
  geom_tile(aes(fill = value)) +
  geom_text(aes(label = round(value, 2)))

enter image description here

Upvotes: 3

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