POLYSMOOTH_SORTFIELD is the jMap module of jLab.

 POLYSMOOTH_SORTFIELD  Returns sorted field values for a mapping problem.
    ZS=POLYSMOOTH_SORTFIELD(INDEXS,Z), where INDEXS is a cell array of
    indices as output by SPHERESORT or TWODSORT, applies INDEXS to the
    input field Z, leading to the output ZS.
    ZS contains the elements of Z, sorted in terms of increasing distance 
    from a set of grid points, as specified by SPHERESORT or TWODSORT.
    [ZS1,ZS2,...,ZSK]=POLYSMOOTH_SORTFIELD(INDEXS,Z1,Z2,...,ZK) also works.
    This is mainly an auxillary function used with SPHERESORT or TWODSORT.
    However, it is useful to call directly for the "One grid, many fields" 
    case described in POLYSMOOTH.
    Usage: zs=polysmooth_sortfield(indexs,z);
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2018--2020 J.M. Lilly --- type 'help jlab_license' for details

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