.BG
.FN eigen
.TL
Eigen Analysis of Symmetric Matrix
.CS
eigen(x)
.AG x
matrix to be decomposed. Must be square and symmetric.
.RT
a list containing the eigenvalues and eigenvectors of `x'.
.RC values
vector of `n' eigenvalues
in descending order.
.RC vectors
matrix like `x' giving the
eigenvectors corresponding to the eigenvalues in `values'.
.SA
`svd'.
.EX
cors <- cor(x,y,trim=.1)
pprcom <- eigen(cors)
.KW array
.KW algebra
.WR
