[R] a very simple question

[David Winsemius]

On Mar 18, 2012, at 4:43 PM, Dajiang Liu wrote:

>
> Dear All,
> I have a seemingly very simple question, but I just cannot figure  
> out the answer. I attempted to run the  
> following:a=0.1*(1:9);which(a==0.3);it returns integer(0). But  
> obviously, the third element of a is equal to 0.3.
> I must have missed something. Can someone kindly explain why? Thanks  
> a lot.

It has already been explained on this list ... "frequently" in FAQt.

Locate the FAQ and search for a question about why R doesn't think two  
numbers are equal. The FAQ should be part of a standard instalL on the  
main help page.


> Regards,Dajiang
> 		 	   		
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT