%SETPOSTPROC (Re)set POSTPROC field of a datafile
%
% A = SETPOSTPROC(A,MAPPING)
% A = SETPOSTPROC(A)
%
% INPUT
% A - Datafile
% POSTPROC - cell containing postprocessing mapping command
%
% OUTPUT
% A - Datafile
%
% DESCRIPTION
% Sets the mappings stored in A.POSTPROC. The size of the datafile
% A is set to the output size of PRMAPPING.
% A call without MAPPING clears A.POSTPROC. The size of the datafile
% A is reset to undefined (0).
%
% The mappings in A.POSTPROC may be extended by ADDPOSTPROC.
%
% Mappings in A.POSTPROC are stored only and executed just
% after A is converted from a DATAFILE into a PRDATASET.
%
% SEE ALSO (<a href="http://37steps.com/prtools">PRTools Guide</a>)
% DATAFILES, SETPREPROC, ADDPOSTPROC.