4 Comments
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Cody Wan's avatar

Vector form of Y should be Y=X beta + epsilon. What you have the dimension doesn’t add up.

Omar AlSuwaidi's avatar

I believe you're right, because you can't go from (X^T) (B @ X) to X^T @ X @ B

Omar AlSuwaidi's avatar

Very important concepts that touch on statistic's fundamentals. Really love these "low-level" topics!

Srinivas's avatar

Great stuff. Simple to understand