this might be obvious, but since we are being thorough, need to define (for the "nearest" option) what happens when the data falls exactly midway between the breakpoints, as there are several possibilities. I believe the IEEE standard for rounding floating numbers is to round to even (lowest bit zero), but it's hard to see how we make that useful here. But it is best to avoid a scheme that introduces a bias, like "always round up in a tie". On the other hand it may not make a significant difference, but at least should be defined.
Randy
