[R] Bulk Match/Replace

[Phil Spector]

Nathan -
    One way would be

         df$id[match(v,df$Name)]


 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu

On Wed, 27 Jan 2010, Nathan S. Watson-Haigh wrote:

> This must be easy to do.....
>
> I have a vector and a lookup data.frame:
>
>> v
>  [1] "5"   "234"   "234"   "42-43"   "234"   "42-43"   "234"   "234" 
> "42-43"   "234"   "5"   "234"   "234"   "5"   "234"   "234"   "5"   "234" 
> "234"
>> df
>  id  Name
> 1         5 12-13
> 2         2   234
> 3         4 42-43
> 4         1     5
>
> How can I simply substitute the values in vector v with the corresponding id 
> value from lookup table df? I'd expect the following output:
>> v
>  [1] "1"   "2"   "2"   "4"   "2"   "4"   "2"   "2"   "4"   "2"   "1"   "2" 
> "2"   "1"   "2"   "2"   "1"   "2"   "2"
>
> Cheers,
> Nathan
>
> -- 
> --------------------------------------------------------
> Dr. Nathan S. Watson-Haigh
> OCE Post Doctoral Fellow
> CSIRO Livestock Industries
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>
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>
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