The error message "Unable to invert xtx" typically suggests that there is an issue with the matrix inversion process, which can occur for several reasons:
Multicollinearity: This is the most common cause. When predictors in your model are highly correlated, the
𝑋
′
𝑋
X
′
X matrix becomes nearly ...
Search found 1 match
- Wed Jul 17, 2024 5:17 am
- Forum: MLwiN user forum
- Topic: Error "Unable to invert xtx."
- Replies: 2
- Views: 52550