[R] Frequency vector

[David Carslaw]

how about:
a <- c(1,1,1,1,2,3,4,5,5)
b <- as.data.frame(table(a))
b
  a Freq
1 1    4
2 2    1
3 3    1
4 4    1
5 5    2

which you can then select the bits you want from.

David





dennis11 wrote:
> 
> I want to create a vecor with frequencies. 
> 
> I have tried this:
> 
> a <- c(1,1,1,1,2,3,4,5,5)
> b <- table(a)
> print (b[1])
> 
> which results in:
>> print (b[1])
> 1 
> 4 
> 
> The only thing I want is the 4.
> 
> So this seems obvious:
> print (b[1,2])
> 
> but it does not work:
> Error in b[1, 2] : incorrect number of dimensions
> 
> How do I get a vector or how do I refer to the "4" without getting the "1"
> label as well?
> 


-----
Institute for Transport Studies
University of Leeds
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