function [Minc]=subMinc(u)
Minc=zeros(6,4);
Minc(1,3)=-1;
Minc(2,4)=-1;
Minc(3,1)=-1;Minc(3,3)=1;
Minc(4,2)=-1;Minc(4,3)=1;
Minc(5,1)=-1;Minc(5,4)=1;
Minc(6,2)=-1;Minc(6,4)=1;
% Barra 1 = m
% Barra 2 = p
% Barra 3 = S
% Barra 4 = R
% Imp. de Transf. iría entre Barras 3-4
e-REdING. Biblioteca de la Escuela Superior de Ingenieros de Sevilla.
