getVarName

GETVARNAME  Get variable name by variable index (as in H matrix).
   [OUTPUT PARAMETERS]
   varName: comprise both variable type ('Va', 'Vm') and the bus number of
   the variable. For instance, Va8, Vm10, etc.
   created by Rui Bo on Jan 9, 2010

0001 function [varName] = getVarName(varIndex, pv, pq)
0002 %GETVARNAME  Get variable name by variable index (as in H matrix).
0003 %   [OUTPUT PARAMETERS]
0004 %   varName: comprise both variable type ('Va', 'Vm') and the bus number of
0005 %   the variable. For instance, Va8, Vm10, etc.
0006 %   created by Rui Bo on Jan 9, 2010
0007 
0008 %   MATPOWER
0009 %   $Id: getVarName.m 1635 2010-04-26 19:45:26Z ray $
0010 %   by Rui Bo
0011 %   Copyright (c) 2009-2010 by Rui Bo
0012 %
0013 %   This file is part of MATPOWER.
0014 %   See http://www.pserc.cornell.edu/matpower/ for more info.
0015 %
0016 %   MATPOWER is free software: you can redistribute it and/or modify
0017 %   it under the terms of the GNU General Public License as published
0018 %   by the Free Software Foundation, either version 3 of the License,
0019 %   or (at your option) any later version.
0020 %
0021 %   MATPOWER is distributed in the hope that it will be useful,
0022 %   but WITHOUT ANY WARRANTY; without even the implied warranty of
0023 %   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0024 %   GNU General Public License for more details.
0025 %
0026 %   You should have received a copy of the GNU General Public License
0027 %   along with MATPOWER. If not, see <http://www.gnu.org/licenses/>.
0028 %
0029 %   Additional permission under GNU GPL version 3 section 7
0030 %
0031 %   If you modify MATPOWER, or any covered work, to interface with
0032 %   other modules (such as MATLAB code and MEX-files) available in a
0033 %   MATLAB(R) or comparable environment containing parts covered
0034 %   under other licensing terms, the licensors of MATPOWER grant
0035 %   you additional permission to convey the resulting work.
0036 
0037 %% get non reference buses
0038 nonref = [pv;pq];
0039 
0040 if varIndex <= length(nonref)
0041     varType = 'Va';
0042     newIdx = varIndex;
0043 else
0044     varType = 'Vm';
0045     newIdx = varIndex - length(nonref);
0046 end
0047 varName = sprintf('%s%d', varType, nonref(newIdx));