Hi!
Is it possible to automatically construct a table like this:
# treat B
# improvement
# + -
#treat A improvement + 1 3
# - 2 1
From these data:
pair <- c(1,1,2,2,3,3,4,4,5,5,6,6,7,7) # identification
treat <- c(1,0,1,0,1,0,1,0,1,0,1,0,1,0) # treatament 1 (A) or 0 (B)
impr <- c(1,0,1,0,1,0,0,1,0,1,0,0,1,1) # improvement 1 (yes) 0 (no)
treatfac <- factor(treat)
levels(treatfac)<-list("A"=1,"B"=0 )
imprfac <- factor(impr)
levels(imprfac)<-list("+"=1,"-"=0)
data.frame(pair,treatfac,imprfac)
pair treatfac imprfac
1 1 A +
2 1 B -
3 2 A +
4 2 B -
5 3 A +
6 3 B -
7 4 A -
8 4 B +
9 5 A -
10 5 B +
11 6 A -
12 6 B -
13 7 A +
14 7 B +
I tried some functions like table or even xtabs, but the results doesn't
show the pairs combinations.
Thanks in advance,
Maurício Cardeal
Federal University of Bahia, Brazil
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