I have data on individuals who worked on a project. The table looks like:

Bob Mary Jon Steve Susan Tyler
Project1 1 1 0 0 0 0
Project2 0 0 1 1 1 1
Project3 1 0 1 0 1 1

I want to create a matrix that tells me how many times each individual has
worked with each other. So from the list above I would get

Bob Mary Jon Steve Susan Tyler
Bob X 1 1 0 1 1
Mary X X 0 0 0 0
Jon X X X 1 2 2
Steve X X X X 1 1
Susan X X X X X 2
Tyler X X X X X X


The X's are actually a mirror image of the upper triangle.

Is there an way to do this?