Module utils

Structs§

Counter: A simple Counter iterator to use in demos and tests.
LinearSystem: Utility Functions for the Conjugate Gradient Method A linear system, ax-b=0, to be solved iteratively, with an optional initial solution.

expose_w
generate_enumerated_step_stream: Produce an enumerated stream like [(0,a), (1,a),…, (capacity, b), …, (stream_length-1, b)] with capacity copies of “a” (aka initial_values) and stream_length total values. Utility function used in examples showing convergence of reservoir mean to stream mean.
generate_step_stream: Utility Functions for Reservoir Sampling Produce a stream like [a, …, a, b, …, b] with num_of_initial_values copies of “a” (aka initial_values) and stream_length total values. Utility function used in examples showing convergence of reservoir mean to stream mean.
generate_stream_from_normal_distribution
generate_stream_with_constant_probability: Utility Functions for Weighted Reservoir Sampling utility function for testing ReservoirSample
make_3x3_pd_system_1
make_3x3_pd_system_2
make_3x3_psd_system
mean_of_means_of_step_stream: A stream of 100 weighted datum is generated using generate_step_stream. The first 50 items have value 0 and the remaining 50 have value 1. All weights are set to 1. The mean of a reservoir sample with capacity equal to half the stream length is computed and stored. This is repeated 50 times and the mean of the means is returned.
read_yaml_to_string
write_parameters_to_yaml: Utility functions for writing data to yaml, including for visualizations