[R] Replacing values job

[Peter Dalgaard]

Barry Rowlingson wrote:
> jim holtman wrote:
>   
>> ?match
>>
>>     
>>> X
>>>       
>> [1] 2 6 1 7 4 3 5
>>     
>>> Y
>>>       
>>  [1] 1 1 6 4 6 1 4 1 2 3 6 6 1 2 4 4 5 4 1 7 6 6 4 4 7 1 2
>>     
>>> match(Y,X)
>>>       
>>  [1] 3 3 2 5 2 3 5 3 1 6 2 2 3 1 5 5 7 5 3 4 2 2 5 5 4 3 1
>>
>>     
>
>   I quite like this solution:
>
>   > X[X[X[X[X[X[X[X[X[X[X]]]]]]]]]][Y]
>     [1] 3 3 2 5 2 3 5 3 1 6 2 2 3 1 5 5 7 5 3 4 2 2 5 5 4 3 1
>
>   but somehow I don't think its general enough...
>   
!!

<Grin>

order(X)[Y] 

is a little more general. Still only works when X is a permutation of
1:N, of course.

> Barry
>
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>   


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   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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