mici.utils module
Utility functions and classes.
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class mici.utils.LogRepFloat(val=None, log_val=None)[source]
Bases: object
Numerically stable logarithmic representation of positive float values.
Stores logarithm of value and overloads arithmetic operators to use more
numerically stable implementations where possible.
- Parameters:
-
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property val: float
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mici.utils.hash_array(array)[source]
Compute hash of a NumPy array by hashing data as a byte sequence.
- Parameters:
array (ndarray) – NumPy array to compute hash of.
- Returns:
Computed hash as an integer.
- Return type:
int
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mici.utils.log1m_exp(val)[source]
Numerically stable implementation of log(1 - exp(val)).
- Parameters:
val (float)
- Return type:
float
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mici.utils.log1p_exp(val)[source]
Numerically stable implementation of log(1 + exp(val)).
- Parameters:
val (float)
- Return type:
float
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mici.utils.log_diff_exp(val1, val2)[source]
Numerically stable implementation of log(exp(val1) - exp(val2)).
- Parameters:
-
- Return type:
float
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mici.utils.log_sum_exp(val1, val2)[source]
Numerically stable implementation of log(exp(val1) + exp(val2)).
- Parameters:
-
- Return type:
float
