PHReg.
baseline_cumulative_hazard_function
Returns a function that calculates the baseline cumulative hazard function for each stratum.
params : ndarray
The model parameters.
A dict mapping stratum names to the estimated baseline
cumulative hazard function.
statsmodels.duration.hazard_regression.PHReg.baseline_cumulative_hazard
statsmodels.duration.hazard_regression.PHReg.breslow_gradient
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