annotate tests/test-summaries/expected/testplug-curve-vsr-variance.csv @ 302:1e6cee321cc0

Added tag sonic-annotator-1.5 for changeset 929e37acf0d9
author Chris Cannam
date Thu, 25 May 2017 15:01:41 +0100
parents 6a804920b4a8
children
rev   line source
Chris@235 1 # Sonic Annotator's summary method integrates the values across
Chris@235 2 # time. If an output lacks duration for its features, each feature is
Chris@235 3 # considered to extend until the timestamp of the following feature,
Chris@235 4 # and the final feature is considered to extend until the end of the
Chris@235 5 # input or the last-ending output, whichever is later.
Chris@235 6 #
Chris@235 7 # The curve-vsr output is therefore considered to have 9 values (0.0
Chris@235 8 # to 0.8) that span 0.75 seconds each, followed by one value (0.9)
Chris@235 9 # that spans the 3 seconds from 6.75 to 9.75 where the final output of
Chris@235 10 # the plugin ends (that's the notes-regions output).
Chris@235 11 #
Chris@235 12 # We can consider the last feature the same as four features of 0.75
Chris@235 13 # seconds each (i.e. the same durations as the first 9) each with the
Chris@235 14 # same value, 0.9.
Chris@235 15 #
Chris@235 16 # The mean m is then 7.2 / 13 = 0.553846 approx, and the variance is
Chris@235 17 # the sum for each of the 13 (partly fictitious) values v of (v-m)^2,
Chris@235 18 # divided by 13. This works out as 0.0994083 ish.
Chris@235 19 #
Chris@235 20 0.000000000,9.750000000,variance,0.0994083,"(variance, continuous-time average)"