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statistics: add count to box and whisker plots

Browse source 
When calculating the quartiles, we need the count of dives
anyway, which makes it trivial to export this value to
the frontend.

Fixes an erroneous "mean", which should be "median".

Suggested-by: Peter Zaal <peter.zaal@gmail.com>
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-10 23:11:50 +01:00 committed by Dirk Hohndel
parent 1808804bab
commit bbdd34d069
3 changed files with 10 additions and 9 deletions
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4
stats/boxseries.cpp
View file

@ -119,11 +119,11 @@ std::vector<QString> BoxSeries::formatInformation(const Item &item) const
{
QLocale loc;
return {
item.binName,
StatsTranslations::tr("%1 (%2 dives)").arg(item.binName, loc.toString(item.q.count)),
QStringLiteral("%1:").arg(variable),
infoItem(StatsTranslations::tr("min"), unit, decimals, item.q.min),
infoItem(StatsTranslations::tr("Q1"), unit, decimals, item.q.q1),
infoItem(StatsTranslations::tr("mean"), unit, decimals, item.q.q2),
infoItem(StatsTranslations::tr("median"), unit, decimals, item.q.q2),
infoItem(StatsTranslations::tr("Q3"), unit, decimals, item.q.q3),
infoItem(StatsTranslations::tr("max"), unit, decimals, item.q.max)
};

14
stats/statsvariables.cpp
View file

@ -92,7 +92,7 @@ template<> QString invalid_value<QString>()
template<> StatsQuartiles invalid_value<StatsQuartiles>()
{
double NaN = std::numeric_limits<double>::quiet_NaN();
return { NaN, NaN, NaN, NaN, NaN };
return { NaN, NaN, NaN, NaN, NaN, 0 };
}
static bool is_invalid_value(int i)
@ -411,20 +411,20 @@ StatsQuartiles StatsVariable::quartiles(const std::vector<dive *> &dives) const
// This expects the value vector to be sorted!
StatsQuartiles StatsVariable::quartiles(const std::vector<StatsValue> &vec)
{
size_t s = vec.size();
if (s == 0)
int s = (int)vec.size();
if (s <= 0)
return invalid_value<StatsQuartiles>();
switch (s % 4) {
default:
// gcc doesn't recognize that we catch all possible values. disappointing.
case 0:
return { vec[0].v, q3(&vec[s/4 - 1]), q2(&vec[s/2 - 1]), q1(&vec[s - s/4 - 1]), vec[s - 1].v };
return { vec[0].v, q3(&vec[s/4 - 1]), q2(&vec[s/2 - 1]), q1(&vec[s - s/4 - 1]), vec[s - 1].v, s };
case 1:
return { vec[0].v, vec[s/4].v, vec[s/2].v, vec[s - s/4 - 1].v, vec[s - 1].v };
return { vec[0].v, vec[s/4].v, vec[s/2].v, vec[s - s/4 - 1].v, vec[s - 1].v, s };
case 2:
return { vec[0].v, q1(&vec[s/4]), q2(&vec[s/2 - 1]), q3(&vec[s - s/4 - 2]), vec[s - 1].v };
return { vec[0].v, q1(&vec[s/4]), q2(&vec[s/2 - 1]), q3(&vec[s - s/4 - 2]), vec[s - 1].v, s };
case 3:
return { vec[0].v, q2(&vec[s/4]), vec[s/2].v, q2(&vec[s - s/4 - 2]), vec[s - 1].v };
return { vec[0].v, q2(&vec[s/4]), vec[s/2].v, q2(&vec[s - s/4 - 2]), vec[s - 1].v, s };
}
}

1
stats/statsvariables.h
View file

@ -50,6 +50,7 @@ struct StatsQuartiles {
double min;
double q1, q2, q3;
double max;
int count;
bool isValid() const;
};