# !/usr/bin/env python
#  -*- coding: UTF-8 -*-

# Copyright (c) 2012-2015 <NAME>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import math
from pycast.errors.meanabsolutepercentageerror import MeanAbsolutePercentageError

class WeightedMeanAbsolutePercentageError(MeanAbsolutePercentageError):

    """Implements a weighted alternative of the MeanAbsolutePercentageError."""

    def local_error(self, originalValue, calculatedValue):
        """Calculates the error between the two given values.

        :param list originalValue:    List containing the values of the original data.
        :param list calculatedValue:    List containing the values of the calculated TimeSeries that
            corresponds to originalValue.

        :return:    Returns the error measure of the two given values.
        :rtype:     numeric
        """
        originalValue = originalValue[0]
        calculatedValue = calculatedValue[0]

        if 0 == originalValue:
            return None

        signed_mape = (calculatedValue - originalValue) / float(originalValue) * 100.0
        if signed_mape < 0:
            signed_mape *= 2

        return math.fabs(signed_mape)

WMAPE = WeightedMeanAbsolutePercentageError

# !/usr/bin/env python
#  -*- coding: UTF-8 -*-

# Copyright (c) 2012-2015 <NAME>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import math
from pycast.errors.meanabsolutepercentageerror import MeanAbsolutePercentageError

class WeightedMeanAbsolutePercentageError(MeanAbsolutePercentageError):

    """Implements a weighted alternative of the MeanAbsolutePercentageError."""

    def local_error(self, originalValue, calculatedValue):
        """Calculates the error between the two given values.

        :param list originalValue:    List containing the values of the original data.
        :param list calculatedValue:    List containing the values of the calculated TimeSeries that
            corresponds to originalValue.

        :return:    Returns the error measure of the two given values.
        :rtype:     numeric
        """
        originalValue = originalValue[0]
        calculatedValue = calculatedValue[0]

        if 0 == originalValue:
            return None

        signed_mape = (calculatedValue - originalValue) / float(originalValue) * 100.0
        if signed_mape < 0:
            signed_mape *= 2

        return math.fabs(signed_mape)

WMAPE = WeightedMeanAbsolutePercentageError

# !/usr/bin/env python #  -*- coding: UTF-8 -*- # Copyright (c) 2012-2015 <NAME> # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Implements a weighted alternative of the MeanAbsolutePercentageError. Calculates the error between the two given values.          :param list originalValue:    List containing the values of the original data.         :param list calculatedValue:    List containing the values of the calculated TimeSeries that             corresponds to originalValue.          :return:    Returns the error measure of the two given values.         :rtype:     numeric