[R] counting the number of times a string appears

[Adrian Dusa]

Hi Jesse,

If your vector is called "aa", then how about:

> table(aa)
aa
 spp1 spp10  spp2  spp3  spp4  spp5  spp6  spp7  spp8  spp9
    7     2    16     8    15     9     9    10     9    15

Hope this helps,
Adrian


On Thursday 14 January 2010, Jesse Sinclair wrote:
> Hi all,
> 
> I have a vector of strings and need to count the number of times a string
> appears in the vector.
> 
> eg:
> 
>  [1] spp6  spp10 spp6  spp6  spp4  spp2  spp9  spp10 spp5  spp2  spp2  spp3
>  [13] spp4  spp3  spp6  spp10 spp6  spp4  spp9  spp3  spp6  spp1  spp10
>  spp8
> 
>  [25] spp2  spp10 spp9  spp7  spp1  spp3  spp8  spp6  spp3  spp8  spp6 
>  spp5
> 
>  [37] spp5  spp9  spp3  spp1  spp4  spp5  spp9  spp3  spp3  spp5  spp4 
>  spp9
> 
>  [49] spp3  spp7  spp7  spp2  spp6  spp5  spp7  spp4  spp8  spp9  spp2 
>  spp6
> 
>  [61] spp3  spp3  spp2  spp6  spp3  spp5  spp6  spp6  spp4  spp1  spp1 
>  spp1
> 
>  [73] spp10 spp8  spp1  spp6  spp1  spp5  spp8  spp9  spp5  spp6  spp9
> spp10
>  [85] spp2  spp6  spp10 spp1  spp2  spp3  spp5  spp8  spp2  spp7  spp4 
>  spp7
> 
>  [97] spp2  spp6  spp2  spp6
> 
> Is it possible to create a vector of counts for each spp1-spp10?
> 
> Any help or ideas would be appreciated.
> 
> Cheers,
> Jesse
> 
> 	[[alternative HTML version deleted]]
> 


-- 
Adrian Dusa
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