ccgarch (version 0.2.2)

ljung.box.test: The Ljung-Box Test statistic

Description

This function performs the Ljung-Box Test for a univariate time series.

Usage

ljung.box.test(x)

Arguments

x

a vector of variables to be tested

Value

• LB test statistics and associated p-values for lags 5, 10,..., 50.

References

Ljung, G.M. and G.E.P. Box (1978): On a Measure of Lack of Fit in Time-Series Models, Biometrika, 65, 297--303. McLeod, A.I., and W.K. Li (1983): Diagnostic checking ARMA time series models using squared-residual autocorrelations, Journal of Time Series Analysis, 4, 269--273.

See Also

rob.sk, rob.kr, jb.test

Examples

x <- rnorm(1000)
ljung.box.test(x)           # returns the LB Test statistic
ljung.box.test(x^2)         # returns the McLeord-Li Test for no-ARCH effect