PATCHCONTOURF is the jGraph module of jLab.

 PATCHCONTOURF  Generate filled contours using patches, with specified colors.
    Frequently one wishes to make a filled contour plot of one field over
    another with two different colormap schemes.  This is not currently 
    possible with CONTOURF because Matlab uses one colormap per axes.
    For example, one may wish to plot sea surface temperature filled in 
    color with the continents filled in black.
    PATCHCONTOURS gets around this problem by geneating filled contours 
    plots as patch objects, with out reference to the current colormap.  
    Colors of filled contours may be specified explicitly. 
    PATCHCONTOURF(Z,V) makes a filled contour plot of field Z at value V. 
    The interiors of the contour are colored black by default.
    PATCHCONTOURF(Z,V,C) alternately uses color C as both the fill color 
    and the edge color.  C may be either a string, as in 'g' for green, 
    or a color array of length 3, such as [1/2 1/2 1/2] for gray.
    PATCHCONTOURF(X,Y,Z,V) and PATCHCONTOURF(X,Y,Z,V,C) use vectors X and Y
    to specify the contour locations.  X has length SIZE(X,2) while Y has
    length SIZE(X,1).  
    H=PATCHCONTOURF(...) returns a handle to the patch object.
    PATCHCONTOURF(...,'m_map') alternately works with R. Pawlowicz's M_MAP
    mapping package, available at
    'patchcontourf --f' generates a sample figure.
    Usage: patchcontourf(z,v);
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2015 J.M. Lilly --- type 'help jlab_license' for details

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