biogeme.sampling_of_alternatives.sampling_of_alternatives module¶

Module in charge of functionalities related to the sampling of alternatives

class biogeme.sampling_of_alternatives.sampling_of_alternatives.SamplingOfAlternatives(context)[source]¶

Bases: object

Class dealing with the various methods needed to estimate models with samples of alternatives

add_alphas(the_sample)[source]¶

Add the alpha parameters in the sampled database

sample_alternatives(chosen)[source]¶

Performing the sampling of alternatives

Parameters:: chosen (int) – ID of the chosen alternative, that must be included in the choice set.
Return type:: DataFrame
Returns:: data frame containing a sample of alternatives. The first one is the chosen alternative
Raises:: BiogemeError – if the chosen alternative is unknown.

sample_mev_alternatives()[source]¶

Performing the sampling of alternatives for the MEV terms. Here, the chosen alternative is ignored.

biogeme.sampling_of_alternatives.sampling_of_alternatives.generate_segment_size(sample_size, number_of_segments)[source]¶

This function calculates the size of each segment, so that they are as close to each other as possible, and cover the full sample

Parameters:

Returns:

list of length number_of_segments, containing the segment sizes

Return type:

list[int]