PDF (Probability Density Function) of velocity values
 

I need to evaluate the PDF (Probability Density Function) of axial velocity values on a slice in ParaView 4.3.1.
I want to obtain a plot of the PDF as a function of axial velocity values.

I think you'll have to fetch the data from ParaView to a Numpy array and then continue working with Numpy and matplotlib to make the plot.

I need to evaluate the average values of some quantities through all the slices in ParaView.
How could I do this with Python?