//
//Minimum(maximum) spanning tree Analysis in net work.  
//
//This analysis is solved by prim method.
//Spanning trees are root by which all node can accept information. 
//

//Syntax
prim from_node to_node by span;

//Options
mode:(max min)  //max is max spanning mode. min is min spannnig mode.

//Net work and flow amount of span are defined as blow figure.




//Hand in data which are linked node as upper figure.
hand x y span/
1 5 216.748702
1 4 224
1 2 138.92444
3 2 169.81166
3 1 144.886162
3 5 161.009317
4 5 180.676506
4 2 110.145359
5 2 109.178753
;

//Execute prim command by command base.
prim x y  by span;

//Below is output which shows minimum span path that 'all' colomn is sum of span.





//Below figure is solved minimum span link.