e2i_field

E2I_FIELD   Converts fields of MPC from external to internal indexing.

   This function performs several different tasks, depending on the
   arguments passed.

   MPC = E2I_FIELD(MPC, FIELD, ORDERING)
   MPC = E2I_FIELD(MPC, FIELD, ORDERING, DIM)

   When given a case struct that has already been converted to
   internal indexing, this function can be used to convert other data
   structures as well by passing in 2 or 3 extra parameters in
   addition to the case struct.

   The 2nd argument is a string or cell array of strings, specifying
   a field in the case struct whose value should be converted by
   a corresponding call to E2I_DATA. The field can contain either a
   numeric or a cell array. The converted value is stored back in the
   specified field, the original value is saved for later use and the
   updated case struct is returned. If FIELD is a cell array of strings,
   they specify nested fields.

   The 3rd and optional 4th arguments are simply passed along to
   the call to E2I_DATA.

   Examples:
       mpc = e2i_field(mpc, {'reserves', 'cost'}, 'gen');

       Reorders rows of mpc.reserves.cost to match internal generator
       ordering.

       mpc = e2i_field(mpc, {'reserves', 'zones'}, 'gen', 2);

       Reorders columns of mpc.reserves.zones to match internal
       generator ordering.

   See also I2E_FIELD, E2I_DATA, EXT2INT.

0001 function mpc = e2i_field(mpc, field, ordering, dim)
0002 %E2I_FIELD   Converts fields of MPC from external to internal indexing.
0003 %
0004 %   This function performs several different tasks, depending on the
0005 %   arguments passed.
0006 %
0007 %   MPC = E2I_FIELD(MPC, FIELD, ORDERING)
0008 %   MPC = E2I_FIELD(MPC, FIELD, ORDERING, DIM)
0009 %
0010 %   When given a case struct that has already been converted to
0011 %   internal indexing, this function can be used to convert other data
0012 %   structures as well by passing in 2 or 3 extra parameters in
0013 %   addition to the case struct.
0014 %
0015 %   The 2nd argument is a string or cell array of strings, specifying
0016 %   a field in the case struct whose value should be converted by
0017 %   a corresponding call to E2I_DATA. The field can contain either a
0018 %   numeric or a cell array. The converted value is stored back in the
0019 %   specified field, the original value is saved for later use and the
0020 %   updated case struct is returned. If FIELD is a cell array of strings,
0021 %   they specify nested fields.
0022 %
0023 %   The 3rd and optional 4th arguments are simply passed along to
0024 %   the call to E2I_DATA.
0025 %
0026 %   Examples:
0027 %       mpc = e2i_field(mpc, {'reserves', 'cost'}, 'gen');
0028 %
0029 %       Reorders rows of mpc.reserves.cost to match internal generator
0030 %       ordering.
0031 %
0032 %       mpc = e2i_field(mpc, {'reserves', 'zones'}, 'gen', 2);
0033 %
0034 %       Reorders columns of mpc.reserves.zones to match internal
0035 %       generator ordering.
0036 %
0037 %   See also I2E_FIELD, E2I_DATA, EXT2INT.
0038 
0039 %   MATPOWER
0040 %   Copyright (c) 2009-2015 by Power System Engineering Research Center (PSERC)
0041 %   by Ray Zimmerman, PSERC Cornell
0042 %
0043 %   $Id: e2i_field.m 2644 2015-03-11 19:34:22Z ray $
0044 %
0045 %   This file is part of MATPOWER.
0046 %   Covered by the 3-clause BSD License (see LICENSE file for details).
0047 %   See http://www.pserc.cornell.edu/matpower/ for more info.
0048 
0049 if nargin < 4
0050     dim = 1;
0051 end
0052 if ischar(field)
0053     mpc.order.ext.(field) = mpc.(field);
0054     mpc.(field) = e2i_data(mpc, mpc.(field), ordering, dim);
0055 else    %% iscell(field)
0056     for k = 1:length(field)
0057         s(k).type = '.';
0058         s(k).subs = field{k};
0059     end
0060     mpc.order.ext = subsasgn(mpc.order.ext, s, subsref(mpc, s));
0061     mpc = subsasgn(mpc, s, ...
0062         e2i_data(mpc, subsref(mpc, s), ordering, dim) );
0063 end