Web Reference: Dot product of two arrays. Specifically, If both a and b are 1-D arrays, it is inner product of vectors (without complex conjugation). If both a and b are 2-D arrays, it is matrix multiplication, but using matmul or a @ b is preferred. Dec 19, 2025 · numpy.dot () is used to compute the dot product of two arrays. For 1D arrays, it returns the scalar dot product. For 2D arrays, it performs matrix multiplication. For arrays with N dimensions, it performs a sum-product over the last axis of the first array and the second-to-last axis of the second array. Learn how to effectively use the numpy dot function for matrix multiplication and vector dot products. This guide provides step-by-step instructions for accurate implementation.
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