Better testing for NaN correlations in compute_equalgrid_corr, which now additionally returns the number of points that contribute to each part of the lagged correlation maps.  Amended the original 'npts' return variable to include a lag_length dimension, to account for variations in the number of contributing gridpoints with lag.
Better testing for NaN correlations in compute_equalgrid_corr, which now additionally returns the number of points that contribute to each part of the lagged correlation maps.  Amended the original 'npts' return variable to include a lag_length dimension, to account for variations in the number of contributing gridpoints with lag.

nick-klingaman/ASoP