Python Matplotlib contourf() Function: Create Filled Contour Plots

The code "ax.contourf(xx, yy, z, alpha=1)" is used to create a filled contour plot on the "ax" subplot object. \n\nHere, "xx" and "yy" represent the coordinate values of the grid points, and "z" is a 2D array containing the values of the function to be plotted on the contour plot. \n\nThe "alpha" parameter is used to set the transparency of the filled contours. A value of 1 means the contours will be fully opaque, while a value of 0 means they will be fully transparent. \n\nThis code will create a filled contour plot on the given subplot object "ax" using the provided coordinate values and function values.