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78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
"""A wrapper for ConfusionMatrices."""
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from __future__ import annotations
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from typing import Any, Dict, List, Optional, Union
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from ee import apifunction
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from ee import computedobject
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from ee import ee_array
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_ArrayType = Union[ee_array.Array, computedobject.ComputedObject]
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_ConfusionMatrixType = Union['ConfusionMatrix', computedobject.ComputedObject]
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_ListType = Union[List[Any], computedobject.ComputedObject]
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class ConfusionMatrix(computedobject.ComputedObject):
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"""An object to represent an Earth Engine ConfusionMatrix.
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Examples:
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# Construct a confusion matrix. Rows correspond to actual values, columns to
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# predicted values.
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matrix = ee.Array([[32, 0, 0, 0, 1, 0],
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[ 0, 5, 0, 0, 1, 0],
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[ 0, 0, 1, 3, 0, 0],
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[ 0, 1, 4, 26, 8, 0],
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[ 0, 0, 0, 7, 15, 0],
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[ 0, 0, 0, 1, 0, 5]])
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ee.ConfusionMatrix(matrix)
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"""
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_initialized: bool = False
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def __init__(
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self,
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array: Optional[Union[_ArrayType, _ConfusionMatrixType]],
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order: Optional[_ListType] = None,
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):
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"""Creates a ConfusionMatrix wrapper.
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Creates a confusion matrix. Axis 0 (the rows) of the matrix correspond to
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the actual values, and Axis 1 (the columns) to the predicted values.
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Args:
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array: A square, 2D array of integers, representing the confusion matrix.
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order: The row and column size and order, for non-contiguous or non-zero
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based matrices.
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"""
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self.initialize()
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if isinstance(array, computedobject.ComputedObject) and order is None:
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if self.is_func_returning_same(array):
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# If it is a call that already returns a ConfusionMatrix, just cast.
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super().__init__(array.func, array.args, array.varName)
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return
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args: Dict[str, Any] = {'array': array}
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if order is not None:
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args['order'] = order
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func = apifunction.ApiFunction(self.name())
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super().__init__(func, func.promoteArgs(args))
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@classmethod
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def initialize(cls) -> None:
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"""Imports API functions to this class."""
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if not cls._initialized:
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apifunction.ApiFunction.importApi(cls, cls.name(), cls.name())
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cls._initialized = True
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@classmethod
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def reset(cls) -> None:
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"""Removes imported API functions from this class."""
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apifunction.ApiFunction.clearApi(cls)
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cls._initialized = False
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@staticmethod
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def name() -> str:
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return 'ConfusionMatrix'
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