spharmPlot(L, resolution)

A simple function for plotting real basis of spherical harmonics with different orders.

% Syntax:
% spharmPlot(L, resolution)
% spharmPlot(L)
% spharmPlot()
%
% Inputs:%
% L: degree of the functions, default value = 2;
% resolution: resolution of sphere surface, default value = 500.
%
% Results:
% green regions represent negative values
% red regions represent positive values