CELLGET is the jCell module of jLab.

 CELLGET  Indexes a cell array of numerical arrays by ID number.
 
    [Y1,Y2,...,YN]=CELLGET(X1,X2,...,XN,ID,IDO) where the N input arrays
    are cell arrays of column vectors, returns those elements of the XN for
    which the identification number ID corresponds to requested list IDO.
 
    ID is a numerical array of the same length as the input cell arrays.
    IDO may either be a scalar or an array. 
 
    If IDO is an array, then the output fields Y1,Y2,...,YN are cell arrays
    with the same length as IDO, containing the corresponding elements of 
    the input fields X1,X2,...,XN.  If a particular entry of IDO is not 
    found within ID, that element of Y1,Y2,...,YN is left empty.  
 
    If IDO is an array, then Y1,Y2,...,YN are numerical arrays containing 
    only the requested element of the input field.  The YN will be empty if 
    the requested identification number is not found within ID.
 
    CELLGET(X1,X2,...,XN,ID,IDO); with no output arguments overwrites the 
    named input variables X1,X2,...,XN, and also overwrites ID with IDO.
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    Use with Lagrangian data
 
    CELLGET is primarily used to extract float or drifter trajectories by 
    identification number, in particular, with FLOATS.MAT and DRIFTERS.MAT.  
 
    For example, with DRIFTER.MAT in memory, USE DRIFTERS followed by 
    CELLGET(NUM,LAT,LON,ID,44000) overwrites cell arrays NUM, LAT, and 
    LON as numerical arrays containing the trajectory of drifter ID#44000. 
    This particular drifter has come to be known as 'drifter Betty'.
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    Usage: [y1,y2,y3]=cellget(x1,x2,x3,id,ido);
           cellget(x1,x2,x3,id,ido);
           cellget(num,lat,lon,id,ido);
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    This is part of JLAB --- type 'help jlab' for more information
    (C) 2015 J.M. Lilly --- type 'help jlab_license' for details