comparison tests/test-summaries/expected/testplug-curve-vsr-mean.csv @ 248:c8e5fcddf8be

Merge

+# Sonic Annotator's summary method integrates the values across
+# time. If an output lacks duration for its features, each feature is
+# considered to extend until the timestamp of the following feature,
+# and the final feature is considered to extend until the end of the
+# input or the last-ending output, whichever is later.
+#
+# The curve-vsr output is therefore considered to have 9 values (0.0
+# to 0.8) that span 0.75 seconds each, followed by one value (0.9)
+# that spans the 3 seconds from 6.75 to 9.75 where the final output of
+# the plugin ends (that's the notes-regions output).
+#
+# The sum of 0.0..0.8 is 3.6, so the mean is (3.6 * 0.75 + 0.9 * 3.0)
+# / 9.75 = 0.553846 approx.
+# 
+# Equivalently we can consider the last feature the same as four
+# features of 0.75 seconds each (i.e. the same durations as the first
+# 9) each with the same value, 0.9. The mean is then the sum of
+# 0.0..0.9 plus three more 0.9s, i.e. 7.2, divided by 13.
+#
+0.000000000,9.750000000,mean,0.553846,"(mean value, continuous-time average)"