vecdot
vecdot(x, y)
For any iterable containers x
and y
(including arrays of any dimension) of numbers (or any element type for which dot
is defined), compute the Euclidean dot product (the sum of dot(x[i],y[i])
) as if they were vectors.
Examples

Compute the dot product of two arrays:
julia> x = [1, 2, 3]; julia> y = [4, 5, 6]; julia> vecdot(x, y) 32
This example calculates the dot product of the arrays
x
andy
. 
Calculate the dot product of two matrices:
julia> A = [1 2; 3 4]; julia> B = [5 6; 7 8]; julia> vecdot(A, B) 70
It computes the dot product of the matrices
A
andB
.  Compute dot product of complex vectors:
julia> x = [1+2im, 3+4im]; julia> y = [5+6im, 7+8im]; julia> vecdot(x, y) 70 + 100im
The function can handle complex numbers and compute the dot product accordingly.
Common mistake example:
julia> x = [1, 2, 3];
julia> y = [4, 5];
julia> vecdot(x, y)
ERROR: DimensionMismatch("dot product arguments have lengths 3 and 2")
In this example, the dimensions of x
and y
are not compatible, causing a DimensionMismatch
error. Make sure that the dimensions of the input arrays are compatible for dot product calculation.
See Also
countfrom, cycle, done, drop, eachindex, enumerate, first, repeated, rest, start, svds, take, vecdot, vecnorm, zip,User Contributed Notes
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