sksurv.nonparametric.nelson_aalen_estimator¶
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sksurv.nonparametric.
nelson_aalen_estimator
(event, time)[source]¶ Nelson-Aalen estimator of cumulative hazard function.
See [1], [2] for further description.
Parameters: - event (array-like, shape = (n_samples,)) – Contains binary event indicators.
- time (array-like, shape = (n_samples,)) – Contains event/censoring times.
Returns: - time (array, shape = (n_times,)) – Unique times.
- cum_hazard (array, shape = (n_times,)) – Cumulative hazard at each unique time point.
References
[1] Nelson, W., “Theory and applications of hazard plotting for censored failure data”, Technometrics, vol. 14, pp. 945-965, 1972. [2] Aalen, O. O., “Nonparametric inference for a family of counting processes”, Annals of Statistics, vol. 6, pp. 701–726, 1978.