Function reference • accessibility

Accessibility
`cost_to_closest()`	Minimum travel cost to closest N number of opportunities
`cumulative_cutoff()`	Cumulative access based on a travel cost cutoff
`cumulative_interval()`	Cumulative access based on maximum travel time interval
`floating_catchment_area()`	Floating catchment area accessibility
`gravity()`	Gravity-based accessibility measures
`spatial_availability()`	Spatial availability
`balancing_cost()`	Balancing cost accessibility measure
Decay functions
`decay_binary()`	Binary (a.k.a. step) decay function
`decay_exponential()`	Negative exponential decay function
`decay_linear()`	Linear decay function
`decay_logistic()`	Logistic decay function
`decay_power()`	Inverse power decay function
`decay_stepped()`	Stepped decay function
Inequality
`concentration_index()`	Concentration Index
`gini_index()`	Gini Index
`palma_ratio()`	Palma Ratio
`theil_t()`	Theil T Index
Poverty
`fgt_poverty()`	Foster-Greer-Thorbecke (FGT) poverty measures

Reference