[R] Numeric "Label" of Factor value?
Sarah Goslee
sarah.goslee at gmail.com
Wed Oct 10 20:58:05 CEST 2012
Rui, that doesn't answer the question as I understood it:
Your suggestion returns the numeric value of the second value of the levels:
> as.numeric(levels(abc)[2])
[1] 3
But I read the question as wanting the numeric value of the second
element of abc:
> as.numeric(as.character(abc[2]))
[1] 2
On Wed, Oct 10, 2012 at 2:52 PM, Rui Barradas <ruipbarradas at sapo.pt> wrote:
> Hello,
>
> Try instead
>
> ?levels
> abc <- factor(c(2,2,3,4,7,7))
> as.numeric(levels(abc)[1])
>
> Hope this helps,
>
> Rui Barradas
> Em 10-10-2012 19:39, Brigid Mooney escreveu:
>
>> Sorry, I'm sure I'm not using the appropriate vocab here, which is
>> undoubtedly why I can't seem to find a fix to this (hopefully very
>> easy) problem.
>>
>> Suppose you have a factor
>>
>> abc <- factor(c(2,2,3,4,7,7))
>>
>> And you want to know what the number in the nth spot in that would be
>>
>> abc[1]
>> [1] 2
>> Levels: 2 3 4 7
>>
>> shows the correct label of the first element - but if I want to pull
>> out the numeric value of that label, I thought...
>>
>> as.numeric(abc[1])
>>
>> but that gives
>> [1] 1
>>
>> which is the position of the label in the levels vector of the factor.
>>
>> Ideas?
>>
>> Thanks!
>>
--
Sarah Goslee
http://www.functionaldiversity.org
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