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Back to the original modified Z-score treshold (5)

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This commit is contained in:
Martin Tůma 2020-05-02 20:44:24 +02:00
parent c461b2e549
commit 571ed087e3
1 changed files with 7 additions and 1 deletions
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8
src/data/track.cpp
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@ -42,6 +42,12 @@ static qreal MAD(QVector<qreal> &v, qreal m)
return median(v); return median(v);
} }
/*
Modified Z-score (Iglewicz and Hoaglin)
The acceleration data distribution has usualy a (much) higher kurtosis than
the normal distribution thus a higher comparsion value than the usual 3.5 is
required.
*/
static QSet<int> eliminate(const QVector<qreal> &v) static QSet<int> eliminate(const QVector<qreal> &v)
{ {
QSet<int> rm; QSet<int> rm;
@ -51,7 +57,7 @@ static QSet<int> eliminate(const QVector<qreal> &v)
qreal M = MAD(w, m); qreal M = MAD(w, m);
for (int i = 0; i < v.size(); i++) for (int i = 0; i < v.size(); i++)
if (qAbs((0.6745 * (v.at(i) - m)) / M) > 3.5) if (qAbs((0.6745 * (v.at(i) - m)) / M) > 5.0)
rm.insert(i); rm.insert(i);
return rm; return rm;