it is necessary to convert X & Y to matrices and then do matrix multiplication? or can we keep them as arrays and do dot product as we were taught till now?
will it change the result?
Doubt about lowess matrix multiplication
No, it is not necessary, but highly recommend!
A single matrix multiplication is so much faster than individual dot products (due to some hardware level optimizations done by numpy).
Also, as the models get more complex, working with matrices will reduce the coding effort, code complexity and increases the performance significantly.
Happy Learning!
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