VarianceAccumulator

struct VarianceAccumulator(T, VarianceAlgo varianceAlgo, Summation summation)
struct VarianceAccumulator(T, VarianceAlgo varianceAlgo, Summation summation)
struct VarianceAccumulator(T, VarianceAlgo varianceAlgo, Summation summation)
struct VarianceAccumulator (
T
VarianceAlgo varianceAlgo
Summation summation
) if (
isMutable!T &&
varianceAlgo == VarianceAlgo.twoPass
) {
struct Summator(T, Summation summation) via import mir.math.sum : elementType, Summator;;
eponymoustemplate isConvertibleToSlice(T) via import mir.ndslice.slice : isConvertibleToSlice, isSlice, Slice, SliceKind;;
eponymoustemplate isSlice(T) via import mir.ndslice.slice : isConvertibleToSlice, isSlice, Slice, SliceKind;;
alias Slice = mir_slice via import mir.ndslice.slice : isConvertibleToSlice, isSlice, Slice, SliceKind;;
alias SliceKind = mir_slice_kind via import mir.ndslice.slice : isConvertibleToSlice, isSlice, Slice, SliceKind;;
enum bool isInputRange(R, E); via import std.range : isInputRange;;
this(Slice!(Iterator, N, kind) slice);
this(SliceLike x);
this(Range range);
size_t count();
F mean();
F centeredSumOfSquares();
F variance(bool isPopulation);
}
struct VarianceAccumulator(T, VarianceAlgo varianceAlgo, Summation summation)
struct VarianceAccumulator(T, VarianceAlgo varianceAlgo, Summation summation)

Constructors

this this(Slice!(Iterator, N, kind) slice)
this this(SliceLike x)
this this(Range range)

Members

Functions

centeredSumOfSquares F centeredSumOfSquares()
count size_t count()
mean F mean()
variance F variance(bool isPopulation)

Examples

twoPass

import mir.math.common: approxEqual;
import mir.ndslice.slice: sliced;

auto x = [0.0, 1.0, 1.5, 2.0, 3.5, 4.25,
          2.0, 7.5, 5.0, 1.0, 1.5, 0.0].sliced;

auto v = VarianceAccumulator!(double, VarianceAlgo.twoPass, Summation.naive)(x);
assert(v.variance(true).approxEqual(54.76562 / 12));
assert(v.variance(false).approxEqual(54.76562 / 11));

The OpenD Programming Language

VarianceAccumulator

Constructors

Members

Functions

Examples

Meta

Source