Comments (2)
That homework problem seems to either be incorrect or missing something. The full rank assumption has to come at the beginning so that (X^TX)^{-1} makes sense. Without the full rank assumption you get an ellipsoid in the row space summed with the null space (so an elliptical cylinder?).
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Yeah definitely should have the full rank condition.
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Related Issues (20)
- New Lab-Length lecture on Generalized Additive Models
- Update lecture 2 concept checks HOT 1
- Make Homework #1 Terminology more consistent with lecture HOT 1
- Make slides and/or notes connecting column correlation with eigenvalues
- Make a note sheet or concept check connecting quadratic form with ellipsoids
- Make SVM figures for non-geometrically motivated soft-margin SVM HOT 1
- Visualize and some basic analysis of explicit feature representation for 1-dim Gaussian kernel HOT 1
- More discussion on stopping conditions of iterative algorithms
- Fix kernel concept check question 1 about min(x,y) HOT 1
- Add title, author name, data(?), etc to Krishna's Contrib materials
- Shouldn't use MAP terminology in Bayes risk context (Concept Check 1) HOT 1
- Undefined notation / notation bug in Lecture 1 Concept Check, Topic 2, Question 1 HOT 3
- Make numpy broadcasting compulsory in HW#1
- HW#3 Fix read_data function for python3 HOT 1
- More clarity on model that we have figures for in Recitation 1 HOT 1
- Clean up
- Clean up "equivalence" of penalty and constraint form regularization HOT 1
- Illustration / Discussion of exploding & vanishing gradient
- Add additional captioning on ROC curve
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