getCorr: Average correlation
In jankcorn/stockPortfolio: Build stock models and analyze stock portfolios.

Description Usage Arguments Value Author(s) See Also Examples

Determine the average correlation or average correlation by industry of a variance-covariance matrix.

1	getCorr(V, industry = NULL)

`V`	Variance-covariance matrix.
`industry`	A vector specifying the industry of the stocks in their order given in the columns (and rows) of `V`. This argument is optional.

If industry is not provided, then the average correlation in V in the matrix is returned but ignoring the diagonal. If industry is provided, then the output is a matrix with dimension k-by-k, where k is the number of unique values in industry.

David Diez

stockModel

#===> the covariance matrix of stock94 <===#
data(stock94)
data(stock94Info)
V <- cov(stock94)

#===> the average correlation <===#
getCorr(V)
getCorr(V, industry=stock94Info$industry)