[yy,tt]=doublechirp;
[wv,wvfrequency,wvtime]=wvdc(yy,1,length(yy)/2,1000);
figure;
subplot(2,1,1);
imagesc(wvtime,wvfrequency,wv);axis xy;colormap bone
subplot(2,1,2);
surf(wvtime,wvfrequency,wv);axis tight;shading interp;colormap bone
