Difference between revisions of "DotProduct"
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To compute the dot product of two vectors, use: | To compute the dot product of two vectors, use: | ||
| − | + | :<code>Sum(A*B, I)</code> | |
| − | where | + | 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. | + | 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 <code>A*B</code>. But [[DotProduct]] is not intended to be used explicitly. |
Revision as of 20:58, 6 January 2016
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.
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