Example —
D = rand(100);
figure
contour(D)
To eliminate the ‘-999.999’ values, replace them with NaN values, since those will not be plotted (and likely will appear a white blank areas).
Example —
D = rand(100);
D(5:10,10:20) = -999.999;
D(D == -999.999) = NaN;
figure
contour(D)
