Add Harmonic Mean

Please add a Harmonic Mean function. This is a crucial tool for anyone doing analytics with, for example, speeds. Today, I have to create a column with reciprocal values and then create a measure which counts the rows (numerator) and sums the reciprocal values from the calculated column (denominator). This gets annoying fast when there's more than one harmonic mean to be calculated. The function exists in Excel. And Arithmetic and Geo Mean already exists here, but this 3rd of the pythagorean means is missing from the statistics set.