[R] Bland Altman plot (was: [R] paste ?)

[Zdenek Skala]

Dear all,
sorry for this perhaps stupid question, but it concerns my recent 
problem as well as the current thread on B-A plot.
I would like to plot something like x+y vs. x-y or mean(x,y) vs 
difference (x,y), but my "variables" x,y are actually pairs of 
replicates (two observed values of a growth rate by 60 clones). So 
the order x,y does not matter and each x,y pair can be arranged 
regardless the arrangement of other x,y pairs, - of course, this will 
influence the appearance of the plot. I was playing with plotting 
(x+y) vs. absolute value of (x-y), but this will yield plotting area 
limited by the x=y line (provided the x,y are nonnegative values, 
which is my case). Exists there some standard plotting procedure 
for such data?
Thank you in advance!
Zdenek Skala
++++++++++++++++++++++
] Zdenek Skala
] e-mail:
] Zdenek.Skala at incoma.cz

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