eddington - Compute a Cyclist's Eddington Number
Compute a cyclist's Eddington number, including
efficiently computing cumulative E over a vector. A cyclist's
Eddington number
<https://en.wikipedia.org/wiki/Arthur_Eddington#Eddington_number_for_cycling>
is the maximum number satisfying the condition such that a
cyclist has ridden E miles or greater on E distinct days. The
algorithm in this package is an improvement over the
conventional approach because both summary statistics and
cumulative statistics can be computed in linear time, since it
does not require initial sorting of the data. These functions
may also be used for computing h-indices for authors, a metric
described by Hirsch (2005) <doi:10.1073/pnas.0507655102>. Both
are specific applications of computing the side length of a
Durfee square <https://en.wikipedia.org/wiki/Durfee_square>.
