rrcov (version 0.4-01)

Appalachia: Annual maximum streamflow in central Appalachia

Description

The data on annual maximum streamflow at 104 gaging stations in the central Appalachia region of the United States contains the sample L-moments ratios (L-CV, L-skewness and L-kurtosis) as used by Hosking and Wallis (1997) to illustrate regional freqency analysis (RFA).

Usage

data(Appalachia)

source

Hosking, J. R. M. and J. R. Wallis (1997), Regional Frequency Analysis: An Approach Based on L-moments. Cambridge University Press, p.175--185

Details

The sample L-moment ratios (L-CV, L-skewness and L-kurtosis) of a site are regarded as a point in three dimensional space.

References

Neykov, N.M., Neytchev, P.N., Van Gelder, P.H.A.J.M. and Todorov V. (2007), Robust detection of discordant sites in regional frequency analysis, Water Resources Research, to appear

Examples

data(Appalachia)

    # plot a matrix of scatterplots
    pairs(Appalachia,
          main="Appalachia data set",
          pch=21,
          bg=c("red", "green3", "blue"))

    mcd<-CovMcd(Appalachia)
    mcd
    plot(mcd, which="dist", class=TRUE)
    plot(mcd, which="dd", class=TRUE)