Hello, All,
I have a dataset that looks like this:
x <- matrix(c(
0, 0, 0,
0, 0, 0,
0, 1, 0,
0, 1, 0,
0, 1, 0,
1, 2, 1,
1, 2, 1,
1, 3, 1,
1, 3, 1,
1, 3, 1),
ncol = 5, byrow = T,
dimnames = list(1:10, c("gender", "race", "disease")))
I want to write a function to produce several matrices including only “TRUE”
and “FALSE” for the different levels of the variables (these matrices may be
thought as index matrices), like
> m1
TRUE TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
> m2
FALSE FALSE TRUE TRUE TRUE FALSE FALSE FALSE FALSE FALSE
> m3
FALSE FALSE FALSE FALSE FALSE TRUE TRUE FALSE FALSE FALSE
> m4
FALSE FALSE FALSE FALSE FALSE FALSE FALSE TRUE TRUE TRUE
Can anyone please help how to get this done? Your help would be greatly
appreciated.
Lisa
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