pydata/pandas — pull request #8424 by jaimefrio (2014-09-30 03:26:27+00:00)
Title: ENH: numerically stable `rolling_skew` and `rolling_kurt`

Close #6929. Hat tip to @behzadnouri for the z-scores idea in #8270, and to @seth-p for the general structure of the code, separating removal and addition of observations.