Re: Finding middle of edge in a graph

*To*: mathgroup at smc.vnet.net*Subject*: [mg90012] Re: Finding middle of edge in a graph*From*: Bill Rowe <readnews at sbcglobal.net>*Date*: Thu, 26 Jun 2008 04:43:50 -0400 (EDT)

>---- Yedidel Elhayany <yedidel at gmail.com> wrote: >I have a graph which I need to find the middle of every edge and add a >vertice in that point. What function returns me all the middle points >of edged in a graph? Others (Bob Hanlon) have answered the question you posed. So, I will point out you don't need to know the actual coordinates of the center to place a point at the center of a plot. Instead, you can use scaled coordinates. That is: Plot[f[x], {x, xmin, xmax}, Epilog->{Red, PointSize[.02],Point[Scaled at {.5,.= 5}]}] will put a red point at the center of your plot regardless of details of f, xmin and xmax.