Legend for Contour Plots

Adds a curve description legend to a contour plot

Adds a curve description legend to a contour plot, this is preferable when putting labels on the contour curves clutter up the plot. The default description is the level, but you may optionally supply custom descriptions. You might also include descriptions of other plotted objects in the legend.

Example,

[X, Y, Z]  = peaks(512);
figure
[~, hCont] = contour(X, Y, Z, 'LineWidth', 1.5);
contourLegend(hCont)
figure
[~, hCont] = contourf(X, Y, Z);
contourLegend(hCont)