**Introduction:**

These are results and code for the
problems and examples found in Chapter 2 of this famous book.

- prob_2_1.m (PCA on data with one large variance component)

- prob_2_2.m (a scree plot of multivariate uncorrelated data)

- prob_2_3.m (PCA on trivariate normal random variables)

- prob_2_4.m (more experiments with PCA)

- prob_2_5.m (X X^T v.s. X^T X)

- prob_2_6.m (PCA on multivariate normals)

- prob_2_7.m (PCA on the
`yeast`data)

- prob_2_8.m (PCA on the
`oronsay`and`sparrow`data)

- brokenStick.m (implements the broken stick rule for PCA)

- cumVariance.m (implements the cumulative variance rule for PCA)

- screePlot.m (makes a scree plot)

- sizeOfVariance.m (implements the size of variance rule for PCA)

John Weatherwax Last modified: Sun May 15 08:46:24 EDT 2005