WAVESPECPLOT is the jWavelet module of jLab.

 WAVESPECPLOT  Plot of wavelet spectra together with time series.
    WAVESPECPLOT(T,X,P,W) where T is the time, X is a time series, and W is 
    the wavelet transform at periods P, makes a two-component plot.  The 
    upper subplot has the time series X plotted against its time axis T.
    The lower subplot has the transform W, or its modulus ABS(W) if W is 
    complex-valued, plotted versus the time axis T and the periods P.
    WAVESPECPLOT(T,X,P,W,R) optionally plots ABS(W).^R instead of W.
    WAVESPECPLOT(T,X,P,W,R,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.
    WAVESPECPLOT(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 PACKFIG.
    H=WAVESPECPLOT(...) returns the handles to the subplots. 
    [H,HL]=WAVESPECPLOT(...) also returns the handles to the lines plotted
    in the first panel.
    If X is complex-valued, both the real and imaginary parts are plotted 
    in the uppermost subplot.
    Usage: h=wavespecplot(t,x,p,w);
    'wavespecplot --f' generates a sample figure.
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2004--2015 J.M. Lilly --- type 'help jlab_license' for details

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