function fem2d_scalar_display_txyz ( prefix )

XYZ = load ( strcat ( prefix, '_nodes.txt'    ) );
T  = load ( strcat ( prefix, '_elements.txt' ) );

if ( min ( min ( T ) ) == 0 )
  T = T + 1;
end

trisurf ( T, XYZ(:,1), XYZ(:,2), XYZ(:,3) )
