hist function

Histogram

Create a histogram of the values of a RasterLayer. For large datasets a sample is used. methods

## S4 method for signature 'Raster'
hist(x, layer, maxpixels=100000, plot=TRUE, main, ...)

Arguments

• x: Raster* object
• layer: integer (or character) to indicate layer number (or name). Can be used to subset the layers to plot in a multilayer Raster* object
• maxpixels: integer. To regularly subsample very large objects
• plot: logical. Plot the histogram or only return the histogram values
• main: character. Main title(s) for the plot. Default is the value of names
• ...: Additional arguments. See under Methods and at hist

Returns

This function is principally used for the side-effect of plotting a histogram, but it also returns an S3 object of class 'histogram' (invisibly if plot=TRUE).

See Also

pairs, boxplot

Examples

r1 <- raster(nrows=50, ncols=50)
r1 <- setValues(r1, runif(ncell(r1)))
r2 <- setValues(r1, runif(ncell(r1)))
rs <- r1 + r2
rp <- r1 * r2
par(mfrow=c(2,2))
plot(rs, main='sum')
plot(rp, main='product')
hist(rs)
a = hist(rp)
a