Histogram
Create a histogram of the values of a RasterLayer. For large datasets a sample is used.
## S4 method for signature 'Raster' hist(x, layer, maxpixels=100000, plot=TRUE, main, ...)
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 |
... |
Additional arguments. See under Methods and at |
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).
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
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