Mean, weighted mean, median, weighted median
Python functions to calculate the mean, weighted mean, median, and weighted median.
The easiest way to install WeightedStats is to use pip:
$ pip install weightedstats
WeightedStats includes four functions (mean, weighted_mean, median, weighted_median) which accept lists as arguments, and two functions (numpy_weighted_mean, numpy weighted_median) which accept either lists or numpy arrays.
import weightedstats as ws my_data = [1, 2, 3, 4, 5] my_weights = [10, 1, 1, 1, 9] # Ordinary (unweighted) mean and median ws.mean(my_data) # equivalent to ws.weighted_mean(my_data) ws.median(my_data) # equivalent to ws.weighted_median(my_data) # Weighted mean and median ws.weighted_mean(my_data, weights=my_weights) ws.weighted_median(my_data, weights=my_weights) # Special weighted mean and median functions for use with numpy arrays ws.numpy_weighted_mean(my_data, weights=my_weights) ws.numpy_weighted_median(my_data, weights=my_weights)
Unit tests are in the test/ directory.