[R] Combinations and table selection problem (reviewed)

2010-03-08 Thread Carlos Guerra
Dear all, I have the following dataset: t <- structure(list(pUrb = c(20.160307, 51.965649, 26.009581, 3.141484, 64.296826 ), pUrb_class = structure(c(1L, 1L, 1L, 1L, 1L), .Label = c("0", "1"), class = "factor"), pAgri = c(79.921386, 46.657713, 40.269204, 0, 0.440691), pAgri_class =

[R] combinations and table selection problem

2010-03-08 Thread Carlos Guerra
Dear all, I have a table like this: a <- read.csv("test.csv", header = TRUE, sep = ";") a UTM pUrb pUrb_class pAgri pAgri_class pNatFor pNatFor_class 1 NF188520.160307 NA 79.921386NA