Aaron Schlegel's Notebook of Interesting Things

Often, it is not helpful or informative to only look at all the variables in a dataset for correlations or covariances. A preferable approach is to derive new variables from the original variables that preserve most of the information given by their variances. Principal component analysis is a widely used and popular statistical method for reducing data with many dimensions (variables) by projecting the data with fewer dimensions using linear combinations of the variables, known as principal components.

SVD underpins many statistical and real-world

The inverse of a number is its reciprocal. For example, the inverse of 8