Kendall's normalized tau for time series x
Numeric vector x.
Implicitly assumes a equidistant time series x.
Kendall's normalized tau.
Kendall M, Gibbons JD (1990) 'Rank correlation methods'. Arnold. Sneyers R (1990) 'On statistical analysis of series of observations. Technical Note No 143. Geneva. Switzerland. World Meteorological Society. Schaber J (2003) 'Phenology in German in the 20th Century: Methods, analyses and models. Ph.D. Thesis. University of Potsdam. Germany. http://pub.ub.uni-potsdam.de/2002meta/0022/door.htm