Scalar Product
'dot' or 'scalar' product of vectors or pairwise columns of matrices.
dot(x, y)
x |
numeric vector or matrix |
y |
numeric vector or matrix |
Returns the 'dot' or 'scalar' product of vectors or columns of matrices.
Two vectors must be of same length, two matrices must be of
the same size.
If x and y are column or row vectors, their dot product
will be computed as if they were simple vectors.
A scalar or vector of length the number of columns of x and
y.
dot(1:5, 1:5) #=> 55 # Length of space diagonal in 3-dim- cube: sqrt(dot(c(1,1,1), c(1,1,1))) #=> 1.732051
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