[R] All possible pairs of two variables
Yihui Xie
xieyihui at gmail.com
Thu Sep 11 15:05:15 CEST 2008
But x is from 0 to "y" instead of a fixed number (say, 10)...
If we are to use expand.grid(), we should filter out half of rows in the result:
> z = expand.grid(0:10, 0:10)
> z[z[,1] <= z[,2], ]
Var1 Var2
1 0 0
12 0 1
13 1 1
23 0 2
24 1 2
25 2 2
34 0 3
35 1 3
36 2 3
37 3 3
....
Yihui
On Thu, Sep 11, 2008 at 8:53 PM, hadley wickham <h.wickham at gmail.com> wrote:
> On Wed, Sep 10, 2008 at 11:34 PM, Ron Michael <ron_michael70 at yahoo.com> wrote:
>> I have two variables (x,y) :
>>
>> x : it takes all integer values from 0 to y and,
>> y : takes all values from 0, 10
>>
>> I am looking for some R code to find all possible pairs of (x,y). Can anyone please help me?
>
> ?expand.grid
>
> Hadley
>
> --
> http://had.co.nz/
>
--
Yihui Xie <xieyihui at gmail.com>
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