dot

Dot product of two vectors.

Unqual!(CommonType!(T1, T2)) dot(V1 x, V2 y)
D dot(V1 x, V2 y)
Unqual!(CommonType!(T1, ForeachType!V2)) dot(V1 x, V2 y)
Unqual!(CommonType!(T1, ForeachType!V2))
dot
(
V1 : Series!(I1*, T1*)
T1
I1
V2
)
(
V1 x
,
V2 y
)
if (
isDynamicArray!V2 ||
isSlice!V2
)
D dot(V1 x, V2 y)

Parameters

x V1: sparse vector
y V2: dense vector

Return Value

Type: Unqual!(CommonType!(T1, ForeachType!V2))

scalar x × y

Examples

import mir.series;

auto x = [0u, 3, 5, 9, 10].series([1.0, 3, 4, 9, 13]);
auto y = [0.0, 1.0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
// x: [1, 0, 0, 3, 0, 4, 0, 0, 0, 9, 13,  0,  0,  0]
// y: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
auto r = 0 + 3 * 3 + 4 * 5 + 9 * 9 + 13 * 10;
assert(dot(x, y) == r);
assert(dot(x, y.sliced) == r);
assert(dot(x, y.slicedField) == r);

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Source

See Implementation

mir sparse blas dot functions

dot