unitroot_kpss.Rdunitroot_kpss computes the statistic for the Kwiatkowski et al. unit root test with linear trend and lag 1.
unitroot_pp computes the statistic for the `'Z-alpha'' version of Phillips & Perron unit root test with constant trend and lag 1.
unitroot_kpss(x) unitroot_pp(x)
| x | a univariate time series. |
|---|
A numeric value