DensityHistogram

DensityHistogram[{{x1, y1}, {x2, y2}, ...}] plots a density histogram of the values {xi, yi}.

DensityHistogram[data, bspec] plots a density histogram with bins specified by bspec.

DensityHistogram[data, bspec, hspec] computes bin densities according to hspec.

Examples

Create a 2D density histogram:

data = RandomReal[{0, 1}, {1000, 2}];
DensityHistogram[data]

With specified bin count:

DensityHistogram[data, 20, ColorFunction -> "Rainbow"]

Please visit the official Wolfram Language Reference for more details.