Arrrrrrrrrrrrrrrrrrrrggghhh! The reason nobody has seen me around here all day is because I've been up to my neck in the above. I use histograms to show the genetic distance between a group of people, and I'd like to be able to generate a bell curve graph from that information. Right now, I have to manually count the number of people who are at a certain distance all the way through the histogram, then record where the peak or peaks are located. I have to do other operations after I have figured out the bell curve values (without actually have the graph to look at), but that part isn't a problem. I spent all day trying to follow one of those crazy Microsoft Help documents that ALWAYS leave out important stuff. It was to show how to do a sample bell curve. But the whole thing was incredibly complicated, and it's not clear to me how to replicate it with my own data, or even if it worked properly. Does anyone know of a good source of information on this procedure? I have Excel 2010 and downloaded that addin for data analysis and the one for VBA (just in case I needed it). Microsoft online help sort of dribbles things out bit by bit and searches often pick up totally unrelated stuff. Why is it so hard for them to do a decent job with Help?