Robuta

https://blogs.sas.com/content/iml/2025/01/15/viz-corr-same-eigenvalues.html Visualize correlation matrices that have the same eigenvalues - The DO Loop A colleague asked me an interesting question: Suppose you have a structured correlation matrix, such as a matrix that has a compound symmetric, banded, or an... correlation matricesthe samedo loopvisualizeeigenvalues https://eprints.maths.manchester.ac.uk/2191/ Restoring Definiteness via Shrinking, with an Application to Correlation Matrices with a Fixed... with ancorrelation matricesrestoringdefinitenessvia https://www.sandia.gov/research/publications/details/effective-and-efficient-handling-of-ill-conditioned-correlation-matrices-in-2012-03-01/ Effective and Efficient Handling of Ill – Conditioned Correlation Matrices in Kriging and Gradient... correlation matriceseffectiveefficienthandlingill