Lesson 20
Dot Product & Matmul
Dot product and matrix multiply:
np.dot(a, b) # 1D dot A @ B # matrix multiply
Why this matters
Dot products and matrix multiply are the language of linear models: regression, projections, attention-style combinations of vectors, and layers in neural nets all reduce to these ops on arrays.
@ in Python reads like math and keeps code aligned with textbook notation.
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🎯 Your Task
Dot of [2,3,4]·[5,6,7] → dot. [[1,2],[3,4]] @ [5,6] → mv.
np.dot(a,b), M @ v
⌘⏎ run · ⌘← → nav
▶ Output
Run your code to see output here.