displays the PDE solution in pseudo color
resultvisu(node,triangle,func,varargin)
table of nodes with 3 column [n,x,y]
n is the node number column vector
x is the x coordinate column vector
y is the y coordinate column vector
is a matrix with 5 columns : [n1,node1,node2,node3,flag] node1,node2,node3 are the number of the nodes which constitutes the triangle. n1 is the number of the triangle and flag is an integer not used here
the vector of the solution on each nodes
rect, strf, leg : similar definition as for plot2d function
resultvisu displays the PDE solution in pseudo color.