Apply regression equation function

[janowicz]

Function to impute missing/invalid/outlying values using predictions from a regression model or other statistical model (e.g. poisson). Applies regression equation, which may have been estimated in urbansim or statsmodels.

Examples:

apply_regression(buildings, variable_to_impute, regression_equation, replacement_criteria)
apply_regression(buildings, 'residential_rent', regression_equation)