score_reverse_dependencies {risk.assessr} | R Documentation |
Scoring method for number of reverse dependencies a package has
Description
Score a package for the number of reverse dependencies it has; regularized
Convert the number of reverse dependencies length(x)
into a validation
score [0,1]
1 / (1 + exp(-0.5 * (sqrt(length(x)) + sqrt(20))))
Usage
score_reverse_dependencies(x)
Arguments
x |
number of dependencies |
Details
The scoring function is the classic logistic curve
1 / (1 + exp(-k(x-x[0]))
with a square root scale for the number of reverse dependencies
x = sqrt(length(x))
, sigmoid midpoint is 20 reverse dependencies, ie. x[0] =
sqrt(15)
, and logistic growth rate of k = 0.5
.
1 / (1 + -0.5 * exp(sqrt(length(x)) - sqrt(20)))
Value
numeric value between 1
(high number of reverse dependencies) and
0
(low number of reverse dependencies)
[Package risk.assessr version 2.0.0 Index]