Render a 2D histogram with given points
2-column matrix with point coordinates (X and Y).
2-element vector of rendered area limits (position of the first pixel on the
left/top, and the last pixel on the right/bottom).
You can flip the image coordinate system by flipping the *lim
vectors.
2-element vector size of the result raster, defaults to c(512L,512L)
.
2D histogram with the points "counted" in appropriate pixels.