[R] %in% with matrix of lists

[Jeff Newmiller]

>> [1]  TRUE FALSE  TRUE FALSE  ## NOT c(T,F,T,F)
>
>I'm not sure what you mean by NOT here.  You get the same answer as I
>do, as far as I can see.
>

# valid R
T <- FALSE
# invalid R
TRUE <- FALSE

It is much much safer and clearer to use TRUE/FALSE than T/F. So

c( TRUE, FALSE,  TRUE, FALSE ) may not always be the same as c(T,F,T,F).

I recommend reading the R Inferno to learn about this other such pitfalls. 
-- 
Sent from my phone. Please excuse my brevity.