 in which all fields of the
     same type have been concatenated:
 
       SNEW.F1=[A11;   SNEW.F2=[A12;    ...    SNEW.FN=[A1N;
                A21;            A22;    ...             A2N;
                 :               :      ...              :
                AM1]            AM2]    ...             AMN];
 
    Note S is a single structure, whereas C is a cell array of structures.
 
    As a simple example, with C{1}.F=[1;2] and C{2}.F=[3;4], S=<a href="catstruct.html">catstruct</a>(C)
    returns S wi