R help - Jun 2013 - How to make a test for linearity of a Passing-Bablok Regression

Hi All
I am having some trouble making a test for linearity of my passing bablok
regression.As far as I am concerned i need to make cusum test for linearity to
get a p-value. I can make a cusum plot, but I can not figure out how to test for
linearity.
I hope that my question is clear and that someone can help me.Thanks
-AT 		 	   		  
	[[alternative HTML version deleted]]

On Jun 20, 2013, at 16:21 , Annette Timm wrote:
> Hi All
> I am having some trouble making a test for linearity of my passing bablok
regression.As far as I am concerned i need to make cusum test for linearity to
get a p-value. I can make a cusum plot, but I can not figure out how to test for
linearity.
> I hope that my question is clear and that someone can help me.Thanks
> -AT 		 	   		  
> 	[[alternative HTML version deleted]]
> 
Is this an R question? Anyways:

According to ideology (the maths of the P-B paper is heuristic at best),
the cusum test is equivalent to a two-sample Kolmogorov-Smirnov test, so you
should be able to either use ks.test as is, or, with the appropriate scaling,
feed the max(abs(cusum)) to pkstwo (which can be lifted from the sources of
ks.test).

-- 
Peter Dalgaard, Professor
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com