how to hide line in gui

i wish to hide line on 2d graph

 plot([nodes(i,2) nodes(j,2)],[nodes(i,3) nodes(j,3)],'k.-')

i wish to hide this lines like below image but in below image i draw line with background color that time it is not produce good 2d graph because some time it overwrite the line on node no.so please help me to hide these lines because i wish to draw only red line between source node to destination node

Answer 1

[Walter Roberson]

Change your

   plot([nodes(i,2) nodes(j,2)],[nodes(i,3) nodes(j,3)],'k.-')

to

   plot([nodes(i,2) nodes(j,2)],[nodes(i,3) nodes(j,3)],'k.')