COMB.m

%--------------------------------------------------------------------------
% COMB
%--------------------------------------------------------------------------
% Creation of a COMB object.


%--------------------------------------------------------------------------
% Syntax
%--------------------------------------------------------------------------
CO1 = COMB(opt,coef1,label1,idx1,...
              ,coefn,labeln,idxn);

%--------------------------------------------------------------------------
% Description
%--------------------------------------------------------------------------
% COMB creates a COMB object. This type of object can be used to describe a 
% combination between degrees of freedom. The COMB object has the following
% properties: 
%   - coef:       scalar, vector representing the coefficients of the 
%                 combination
%   - geom_point: POINT object
%   - geom_group: GROUP object
%   - type:       scalar, vector representing the local type of degrees of
%                 freedom included in the combination

%--------------------------------------------------------------------------
% Input arguments
%--------------------------------------------------------------------------
% opt     : STING object describing the type of combination. varargin is 
%           defined according to the value of opt. opt can be: 
%      - LINEAR
%         -- varargin{1}: FLOAT object describing coefficient coef1
%         -- varargin{2}: STRING object describing the label of the part of
%                         the mesh considered label1
%         -- varargin{3}: INTEGER object descring the local type of degree 
%                         of freedom idx1. idx1 can be:
%              - 1 : Direction 1 (displacement)
%              - 2 : Direction 2 (displacement)
%              - 3 : Direction 3 (displacement)
%              - 4 : Direction 1 (rotation)
%              - 5 : Direction 2 (rotation)
%              - 6 : Direction 3 (rotation)
%        
%--------------------------------------------------------------------------
% Output arguments
%--------------------------------------------------------------------------
% CO1     : COMB object

%--------------------------------------------------------------------------
% Example
%--------------------------------------------------------------------------

% co_pilo represent the linear combination 0 x Ux(P1) + 1 x Ux(P2) = 0
co_pilo = COMB('LINEAR',0,'P1',1,1,'P2',1)

co_pilo = 

  COMB with properties:

          coef: [0 1]
    geom_point: [1x2 struct]
    geom_group: []
          type: [1 1]