From 106e58b164d1296f5900d31606e8296cf46df924 Mon Sep 17 00:00:00 2001 From: Ben Kurtovic Date: Wed, 15 Oct 2014 22:41:07 -0500 Subject: [PATCH] Update confidence function comments. --- earwigbot/wiki/copyvios/workers.py | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/earwigbot/wiki/copyvios/workers.py b/earwigbot/wiki/copyvios/workers.py index 59e68b0..07a4e50 100644 --- a/earwigbot/wiki/copyvios/workers.py +++ b/earwigbot/wiki/copyvios/workers.py @@ -261,12 +261,11 @@ class CopyvioWorkspace(object): """Return the confidence of a violation as a float between 0 and 1.""" def conf_with_article_and_delta(article, delta): """Calculate confidence using the article and delta chain sizes.""" - # This piecewise function, C_AΔ(Δ), was defined such that - # confidence exhibits exponential growth until it reaches the - # default "suspect" confidence threshold, at which point it - # transitions to polynomial growth with lim (A/Δ)→1 C_AΔ(A,Δ) = 1. - # A graph can be viewed here: - # http://benkurtovic.com/static/article-delta_confidence_function.pdf + # This piecewise function exhibits exponential growth until it + # reaches the default "suspect" confidence threshold, at which + # point it transitions to polynomial growth with a limit of 1 as + # (delta / article) approaches 1. + # A graph can be viewed here: http://goo.gl/mKPhvr ratio = delta / article if ratio <= 0.52763: return -log(1 - ratio) @@ -275,11 +274,10 @@ class CopyvioWorkspace(object): def conf_with_delta(delta): """Calculate confidence using just the delta chain size.""" - # This piecewise function, C_Δ(Δ), was derived from experimental - # data using reference points at (0, 0), (100, 0.5), (250, 0.75), - # (500, 0.9), and (1000, 0.95) with lim Δ→+∞ C_Δ(Δ) = 1. - # A graph can be viewed here: - # http://benkurtovic.com/static/delta_confidence_function.pdf + # This piecewise function was derived from experimental data using + # reference points at (0, 0), (100, 0.5), (250, 0.75), (500, 0.9), + # and (1000, 0.95), with a limit of 1 as delta approaches infinity. + # A graph can be viewed here: http://goo.gl/lVl7or if delta <= 100: return delta / (delta + 100) elif delta <= 250: