Official release of the accessibility R package on CRAN
The accessibility 📦 offers a set of fast & convenient functions to calculate multiple transport accessibility measures. Given a pre-computed travel cost matrix and some land use data, users can easily calculate transport access to opportunities considering multiple accessibility measures and decay functions. See list of accessibility measures and decay functions below. Please have a look at the package website for reproducible example.
Accessibility functions currently available
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 measure
Decay functions currently available
For convenience, the accessibility package includes some of the most frequently used decay functions in the literature. Additionally, users can pass any custom function to convert travel costs into weights to be applied to opportunities (see vignette).
decay_binary()Binary (a.k.a. step) decay function
decay_exponential()Negative exponential decay function
decay_linear()Linear decay function
decay_power()Inverse power decay function
decay_stepped()Stepped decay function