Easy, I have a 40000 value array. It keeps count of the number of times each 0.1 msec step between -2000 .. 2000 msecs was seen. If two or more bins wind up with the same max count, I report the average of those bin times, otherwise it's the bin with the highest count. I also dump the counts to a file for later plotting. ------------------------- > How do you determine the bin size?