I'm looking for info about a particular kind of graphing technique. Basically, you have a list of elements, and data indicating how closely related the elements are to each other. On the plot, elements that are closely related are plotted close to each other, and ones that are less related are drawn farther away. I'm trying to find out what this kind of graph is called and if there are any related good algorithms for it.
Sorry if this is a bad question, but this has been driving me nuts and it's impossible to search for.
Update: So it was a network graph I was looking for after all; I found this neat freeware tool called Gehpi that pretty much serves my needs. Thanks for the help!