dot product in python [closed]
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28-09-2019 - |
Question
Does this Python code actually find the dot product of two vectors?
import operator
vector1 = (2,3,5)
vector2 = (3,4,6)
dotProduct = reduce( operator.add, map( operator.mul, vector1, vector2))
Solution
You can also use the numpy implementation of dot product which has large array optimizations in native code to make computations slightly faster. Even better unless you are specifically trying to write a dot product routine or avoid dependencies, using a tried tested widely used library is much better than rolling your own.
OTHER TIPS
Yes it does. Here is another way
>>> sum(map( operator.mul, vector1, vector2))
48
and another that doesn't use operator
at all
>>> vector1 = (2,3,5)
>>> vector2 = (3,4,6)
>>> sum(p*q for p,q in zip(vector1, vector2))
48
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