Simple helper function for countour plots
contourplothelper(d, x, y, z, nbins = 32, binwidth = c(10, 10),
points = c(300, 300), title = NULL)
A data frame.
A string with the dataframe column name for x axis.
A string with the dataframe column name for y axis.
A string with the dataframe column name for z axis.
The number bins. The default is 32.
The binwidths for 'kde2d'. Can be an scalar or a vector.
The number of grid points. Can be an scalar or a vector.
The optional plot title. May be omited.