[Gmsh] Visualization of scalar values on line elements

[Matt Salveson]

I am having difficulty plotting scalar values on line elements.  In 
particular, I have added a truss element (axial load only) to my finite 
element code, and I want to plot the axial stress.  When I create the 
plot, the value scale looks correct, but the colors on the plotted 
elements don't make any sense.  Anyone have a quick example?  I suspect 
the solution is simple...

Thanks!
Matt Salveson