[R] ks.test "greater" and "less"

[Carmen Meier]

Prof Brian Ripley schrieb:
> On Sat, 16 Dec 2006, R. Villegas wrote:
>
>> 2006/12/15, Carmen Meier <carmei3 at web.de>:
>>> Hello r-group
>>> I have a question to the ks.test.
>>> I would expect different values for less and greater between data1 and
>>> data2.
>>> Does anybody could explain  my point of misunderstanding the function?
>
> The help page says:
>
>      This is a comparison of cumulative distribution
>      functions, and the test statistic is the maximum difference in
>      value, with the statistic in the '"greater"' alternative being D^+
>      = max_u [ F_x(u) - F_y(u) ].
>
> data1 and data2 have the same empirical CDF, so should and do give the 
> same value of the test statistic.
>
> We cannot know what you misunderstanding is, since you have not 
> explained your expectations.
>
Thank you for your answers,
seems that I was abusing the R-Group for statistical question which 
should be posted in f.e. sci.stat.edu.

.. the misunderstanding was, that I thought ks.test is different between 
sort order decreasing and increasing.

With regards Carmen