Changelog

0.9.1

Added a data generation method, generate_new_data to BetaGeoBetaBinomFitter. @zscore
Fixed a bug in summary_data_from_transaction_data that was casting values to int prematurely. This was solved by including a new param freq_multiplier to be used to scale the resulting durations. See #100 for the original issue. @aprotopopov
Performance and bug fixes in utils.expected_cumulative_transactions. @aprotopopov
Fixed a bug in utils.calculate_alive_path that was causing a difference in values compared to summary_from_transaction_data. @DaniGate

0.9.0

fixed many of the numpy warnings as the result of fitting
added optional initial_params to all models
Added conditional_probability_of_n_purchases_up_to_time to ParetoNBDFitter
Fixed a bug in expected_cumulative_transactions and plot_cumulative_transactions

0.8.1

adding new save_model and load_model functions to all fitters. This will save the model locally as a pickle file.
observation_period_end in summary_data_from_transaction_data and calibration_and_holdout_data now defaults to the max date in the dataset, instead of current time.
improved stability of estimators.
improve Runtime warnings.
All fitters are now in a local file. This doesn't change the API however.