Hello,
I am having two data set original and predicted.
I want to dind QQ-plot fot it.
I tried in following manner :
>qq(original~predicted)

and error was :

Error in qq.formula(o ~ p) : y must have exactly 2 levels

There is an option "qtype" which dosent make any difference.

What is the correct way for plotting QQ-plot or am I missing something.
-- 

Amar Kumar Nandan

	[[alternative HTML version deleted]]

