from ..libgeoda import gda_demean, gda_standardize, gda_standardize_mad
'''
1/19/2021: add demean, standardize, standardize_mad
'''
__author__ = "Xun Li <lixun910@gmail.com>, "
[docs]def demean(data):
"""Demean Standardization
Note:
The mean for each variable is subtracting from each observation resulting in mean zero.
Args:
data (list): An input data of multiple variables for median absolute deviation
Returns:
list: A data array
"""
if data is None:
raise ValueError("The data from selected variable is empty.")
return gda_demean(data)
[docs]def standardize(data):
"""Standardization (Z)
Note:
Standarize data by transforming data to have zero mean and unit variance.
Args:
data (list): An input data of multiple variables for standardization
Returns:
list: A data array
"""
if data is None:
raise ValueError("The data from selected variable is empty.")
return gda_standardize(data)
[docs]def mad(data):
"""Median Absolute Deviation
Note:
Compute the median absolute deviation, i.e., the (lo-/hi-) median of the absolute deviations from the median, and (by default) adjust by a factor for asymptotically normal consistency.
Args:
data (list): An input data of multiple variables for standardization
Returns:
list: A data array
"""
if data is None:
raise ValueError("The data from selected variable is empty.")
return gda_standardize_mad(data)