COLORQUANT is the jGraph module of jLab.

 COLORQUANT  Set the color axis according to quantiles of the data.
 
    COLORQUANT(Q) sets the limits of the color axis CAXIS to the Qth and 
    the 100-Qth data quantiles.  In other words, Q percent of the data will
    be below, and Q percent below, the limits of the color axis.
 
    This can save you a lot of time versus manually setting color axes.
 
    COLORQUANT(QA,QB) sets the limits to the QAth and QBth quantiles.
    
    Note that the parenthesis are optional when the input arguments are 
    numbers, so one can type 'colorquant 10.5' or 'colorquant 10 95'.
 
    COLORQUANT with no input arguments uses the default value of Q=0.1.
 
    COLORQUANT works by grabbing all surface, contour, and scatter data 
    values on the current set of axes. 
 
    CAX=COLORQUANT(...) returns the value of the color axis.
 
    Usage: colorquant
           colorquant(Q)
           colorquant(Q1,Q2)
           colorquant 10
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    (C) 2018--2022 J.M. Lilly --- type 'help jlab_license' for details