"""StudentTUnivariate module."""
from scipy.stats import t
from copulas.univariate.base import BoundedType, ParametricType, ScipyModel
[docs]class StudentTUnivariate(ScipyModel):
"""Wrapper around scipy.stats.t.
Documentation: https://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.t.html
"""
PARAMETRIC = ParametricType.PARAMETRIC
BOUNDED = BoundedType.UNBOUNDED
MODEL_CLASS = t
def _fit_constant(self, X):
self._fit(X)
self._params['scale'] = 0
def _fit(self, X):
dataframe, loc, scale = t.fit(X)
self._params = {
'df': dataframe,
'loc': loc,
'scale': scale
}
def _is_constant(self):
return self._params['scale'] == 0
def _extract_constant(self):
return self._params['loc']