Changes in version 0.0.1.9000                      

Package in development after release of version 0.0.1. Pending
submission of companion manuscript.

                 Changes in version 0.0.1 (2019-08-22)                  

gretel is a package for generalized path analysis. It implements new
measures that are described in a forthcoming research publication, as
well as some traditional path value measures described in Yang, Knoke
(2001).

The exported functions in this package are

  - gpv, which calculates Generalized Path Value
  - ppv, which calculates Probabilistic Path Value
  - binary_distance, peay_path_value, flament_path_length,
    peay_average_path_value, and flament_average_path_length, which
    calculate path value measures described in Yang, Knoke (2001).
  - generate_proximities, which generates a matrix of values
    representing the measures of optimal paths from each source node
    (row index) to each target node (column index).
  - opt_gpv, which identifies the path of optimal Generalized Path Value
    from a particular source node to a particular target node
  - opt_ppv, which identifies the path of optimal Probabilistic Path
    Value from a particular source node to a particular target node
  - all_opt_gpv, which identifies the 'gpv'-optimal paths from every
    source node to every target node
  - all_opt_ppv, which identifies the 'ppv'-optimal paths from every
    source node to every target node
  - unpack, which unpacks the Dijkstra-format encoded shortest paths
    returned by all_opt_gpv and all_opt_ppv. See their help pages for
    details.

The package also includes three example datasets

  - YangKnoke01
  - OpsahlEtAl10
  - BuchDarrah19