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.