# DotProduct

To compute the dot product of two vectors, use:

Sum(A*B, I)

where «I» is the index shared by the two vectors.

The DotProduct function does the same, i.e., DotProduct(A, B, I). Analytica's parser recognizes a dot product of the form Sum(A*B, I) and optimizes it as a call to DotProduct, which avoids an allocation for the intermediate value of A*B. But DotProduct is not intended to be used explicitly.