R help - Apr 2010 - compare variables and take largest value?

Hi!

I have v1, v2 and v3 (data in v. ranges 1 to 4)

v1
   [1]   1   1   1   1 NaN   1   1   4   1   1   3
v2
   [1]   1   1   1   1   1   1   1   1   1   1   1
v3
   [1]   1   1   1   1   1   1   1   1   1   1   1

I want R to compare entries in v1,v2,v3 and in v4 to put largest value
(NA=0).
For example. first line v4 would be 1, but last line v4 would be 3.

What function should I use?


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Vlatka Matkovic Puljic
095/8618 171

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On 22/04/2010 11:07 AM, Vlatka Matkovic Puljic wrote:
> Hi!
>
> I have v1, v2 and v3 (data in v. ranges 1 to 4)
>
> v1
>    [1]   1   1   1   1 NaN   1   1   4   1   1   3
> v2
>    [1]   1   1   1   1   1   1   1   1   1   1   1
> v3
>    [1]   1   1   1   1   1   1   1   1   1   1   1
>
> I want R to compare entries in v1,v2,v3 and in v4 to put largest value
> (NA=0).
> For example. first line v4 would be 1, but last line v4 would be 3.
>
> What function should I use?
>
>   
pmax.

Duncan Murdoch