# Tag: linear algebra

- Solved – State-of-the-art in smoothing splines
- Solved – What should be the correct result of this product $(Y-XW)^T(Y-XW)$
- Solved – What’s the intuition for dot product as it is used in statistics?
- Solved – Sample covariance matrix and its inverse
- Solved – Derivation of Hessian for multinomial logistic regression in BĂ¶hning (1992)
- Solved – Singular Value Decomposition more columns than rows
- Solved – what does scaling the normal vector of a plane (/hyperplane) mean
- Solved – What exactly should be called “projection matrix” in the context of PCA
- Solved – Alternating least square formula
- Solved – What are the steps to convert weighted sum of squares to matrix form