... stiffness=formStiffnessGrid(GDof, numberElements,elementNodes,xx,yy,E,I ,G, J)% function to form global stiffness for grid element stiffness=zeros(GDof);for e=1:numberElements;% elementDof: element degrees ... an integrated programming system, including graphical interfaces anda large number of specialized toolboxes. MATLAB is getting increasingly popularin all fields of science and engineering.This ... a];stiffness(elementDof,elementDof)= stiffness(elementDof,elementDof)+R’*k*R;endThe code for computing the forces in elements is listed below.% function EF=forcesInElementGrid(numberElements, elementNodes,xx,yy,E,I ,G, J,displacements)%...