function overplot_times(times, color)
% overplot_times(times, color)
% Take a set of times in vector and plots them on the
% current axes as vertical lines in color/style .
% They are plotted on top of the current figure
% (e.g. spectrogram).
% 2010-04-13 Dan Ellis dpwe@ee.columbia.edu
ax = axis;
hold on;
plot([times;times],repmat([ax(3);ax(4)],1,length(times)),color);
hold off;