annotate tests/test-summaries/expected/testplug-curve-vsr-variance.csv @ 395:dec56c3e793b
Add a few more files to .hgignore
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Chris Cannam |
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Tue, 09 Jun 2020 17:01:54 +0100 |
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6a804920b4a8 |
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Chris@235
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1 # Sonic Annotator's summary method integrates the values across
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2 # time. If an output lacks duration for its features, each feature is
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3 # considered to extend until the timestamp of the following feature,
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4 # and the final feature is considered to extend until the end of the
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5 # input or the last-ending output, whichever is later.
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6 #
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7 # The curve-vsr output is therefore considered to have 9 values (0.0
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8 # to 0.8) that span 0.75 seconds each, followed by one value (0.9)
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9 # that spans the 3 seconds from 6.75 to 9.75 where the final output of
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10 # the plugin ends (that's the notes-regions output).
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11 #
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12 # We can consider the last feature the same as four features of 0.75
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13 # seconds each (i.e. the same durations as the first 9) each with the
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14 # same value, 0.9.
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15 #
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16 # The mean m is then 7.2 / 13 = 0.553846 approx, and the variance is
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17 # the sum for each of the 13 (partly fictitious) values v of (v-m)^2,
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18 # divided by 13. This works out as 0.0994083 ish.
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19 #
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20 0.000000000,9.750000000,variance,0.0994083,"(variance, continuous-time average)"
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