On Thu, 7 Apr 2005, Liaw, Andy wrote:
- It seems counter-intuitive to allow non-integer values as operand for ":". It also seems a bit odd that 1:2 returns something with storage.mode integer, whereas 0.5:2 gives doubles. Would it make sense to disallow non-integer operands to ":"? I can't think of a situation when non-integer operands for ":" would be good...
It depends on what you mean by non-integer. You certainly want to allow operand with storage.mode "double". You might want to exclude non-integers, but then you have problems with rounding:
a<-sqrt(2) b<-sqrt(3) (a^2):(b^2)
would fail. Allowing non-integers up to some tolerance would be needed, but then there isn't much reason to forbid 0.5:2, and someone might have a use for it.
-thomas
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