Anyone know how to calculate nth percentile (e.g. 5th or 95th percentile) across rows (or columns) of values (of type double) for each row (or column) in a table?

(looks like the 'GroupBy' node has a P^2 percentile approximation but no good old fashioned percentile method)

If there aren't any Nodes available that do this out of the box perhaps someone would be kind enough to point me to resources showing how to use the Python scripting node for accomplishing this type of mathematical task (assuming I would use something like this in Python: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.quantile.html)

many thanks!