Hi, all. I got a lot of help from the this mailing list, it save me a lot
of time. Here is my question.
x<-rep(c(2,3,4),20)y<-sample(rep(c(0,1),30))tr<-rep(c(1:5),6)data1<-data.frame(x,y,tr)data1<-data1[order(data1$tr),]>
data1 x y tr1 2 0 16 4 1 111 3 0 116 2 0 121 4 0 126 3 1 131 2 0
136 4 1 141 3 0 146 2 0 151 4 0 156 3 0 12 3 0 27 2 0 212 4 0
2....... table(data1) > table(data1), , tr = 1 yx 0 1 2 4 0 3 3 1 4 2 2,
, tr = 2 yx 0 1 2 3 1 3 3 1 4 2 2....Question: How to get accumulate
contingency table by variable "tr" in data1? e.g. how to get the following
results., , tr = 1 yx 0 1 2 4 0 3 3 1 4 2 2, , tr = 2 yx 0 1 2 7 1
3 6 2 4 4 4... Thank you for your help. xj.
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