ltaylor-digmap

Apparently MDX implements this as a ParallelPeriod() function. StackOverflow example at http://stackoverflow.com/questions/9895611/how-to-create-a-period-over-period-measurement-in-mdx A relevant measure for my project is "Total Sales Amount for Month." For instance, total sales for February...

I made another commit which could fix the problem. i don't know how to merge the two commits, or make a new pull request which includes both changes.