identical is the scalar equivalent of vectorised ==. Only returns T or F. Must use when comparing non-atomics, like lists, or envs #rstats
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.@hadleywickham: counter-example: identical(1:3, seq(1,3)). There is still no scalar in R. #rstats
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.@hadleywickham Your abuse of terminology,. I'd call identical() a "bitwise object comparison". Of any R type.
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@eddelbuettel the important thing to realise is that == is vectorised and identical is not. like pmax vs. max, sum vs colSums, etc.
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.@hadleywickham Still don't get your point: '1:3 == rev(3:1)' works, but compares each element. So wrap all() around. Or use identical.
Jan 9, 2013 · 2:42 PM UTC
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