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DON'T MERGE mean example #239

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20 changes: 3 additions & 17 deletions source/mir/math/stat.d
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Original file line number Diff line number Diff line change
Expand Up @@ -36,27 +36,13 @@ template mean(Summation summation = Summation.appropriate)
///
@safe @fmamath sumType!Range
mean(Range)(Range r)
if (hasLength!Range
if (hasShape!Range
|| summation == Summation.appropriate
|| summation == Summation.fast
|| summation == Summation.naive)
{
static if (hasLength!Range)
{
auto n = r.length;
return sum!summation(r.move) / cast(sumType!Range) n;
}
else
{
auto s = cast(typeof(return)) 0;
size_t length;
foreach (e; r)
{
length++;
s += e;
}
return s / cast(sumType!Range) length;
}
auto n = r.elementCount; // elementCount uses shape
return sum!summation(r.move) / cast(sumType!Range) n;
}
}

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