R generate 2D histogram from raw data

Question

I have some raw data in 2D, x, y as given below. I want to generate a 2D histogram from the data. Typically, dividing the x,y values into bins of size 0.5, and count the number

Answer 1

For completeness, you can also use the hist2d{gplots} function. It seems to be the most straightforward for a 2D plot:

library(gplots)

# data is in variable df

# define bin sizes
bin_size <- 0.5
xbins <- (max(df$x) - min(df$x))/bin_size
ybins <- (max(df$y) - min(df$y))/bin_size

# create plot
hist2d(df, same.scale=TRUE, nbins=c(xbins, ybins))

# if you want to retrieve the data for other purposes
df.hist2d <- hist2d(df, same.scale=TRUE, nbins=c(xbins, ybins), show=FALSE)
df.hist2d$counts