CI) makes a filled contour plot with contour
    intervals CI.  If CI is not input, then the spectrum is plotted using 
    PCOLOR, which is faster to render but slow to print. For making final 
    figures, it is better to use the contouring option.
 
    <a href="wavespecplot.html">WAVESPECPLOT</a>(T,X,P,W1,W2,...WN,...) makes an N+1 component plot, with
    W1 in the second subplot, W2 in the third, etc.
 
    After plotting, all subplots are packed together using <a href="packfig.html">PACKFIG</a>.
    