lifelines 0.20.2

v0.20.2

on Python PyPI

0.20.2

New features

• Left censoring is now supported in univariate parametric models: .fit(..., left_censorship=True). Examples are in the docs.
• new dataset: lifelines.datasets.load_nh4()
• Univariate parametric models now include, by default, support for the cumulative density function: .cumulative_density_, .confidence_interval_cumulative_density_, plot_cumulative_density(), cumulative_density_at_times(t).
• add a lifelines.plotting.qq_plot for univariate parametric models that handles censored data.

API changes

• plot_lifetimes no longer reverses the order when plotting. Thanks @vpolimenov!
• The C column in load_lcd dataset is renamed to E.

Bug fixes

• fixed a naming error in KaplanMeierFitter when left_censorship was set to True, plot_cumulative_density_() is now plot_cumulative_density().
• added some error handling when passing in timedeltas. Ideally, users don't pass in timedeltas, as the scale is ambiguous. However, the error message before was not obvious, so we do some conversion, warn the user, and pass it through.
• qth_survival_times for a truncated CDF would return np.inf if the q parameter was below the truncation limit. This should have been -np.inf