What are the matlab pcolor equivalents in R?

Question

I have a 16x16 grayscale matrix representing handwriting numbers. Is there a plot in R that I can use for visualization?

Matlab has pcolor, I'm looking for something like that. pcolor

Answer 1

No need to upgrade to additional packages. Base R already has this, see

• help(image)

• help(heatmap)

and Romain's excellent R Graphics Gallery , which has an index for search.

Answer 2

There are many options for something like this. One option is to use geom_tilein ggplot2:

library(ggplot2)
ggplot(melt(volcano), aes(x=X1, y=X2, fill=value)) + geom_tile()

:
_{(: had.co.nz)}

: levelplot ( ) color2D.matplot ( plotrix).