Message-ID: <CAM_vjukW8R8LcdRDnX-CLoOEogcr-Do_aSQ3EOGMwegMAkcGhQ@mail.gmail.com>
Date: 2012-10-30T21:14:15Z
From: Sarah Goslee
Subject: "NA-friendly" operator
In-Reply-To: <CANCN_HT2KmRzz0tNzxzqkSL6T3RJUMt8ouckY_baN03FA+ag8Q@mail.gmail.com>
Here's one option:
> vec<-c(3,4,5,NA,1,NA,9,NA,1)
> subset(vec, vec > 2)
[1] 3 4 5 9
> subset(vec, vec == 1)
[1] 1 1
Sarah
On Tue, Oct 30, 2012 at 5:08 PM, vincent guyader
<vincent.guyader at gmail.com> wrote:
> Hi everyone,
>
> i'm looking for a "NA-friendly" operator
>
> I explain :
>
> vec<-c(3,4,5,NA,1,NA,9,NA,1)
>
> vec[vec == 1] # NA 1 NA NA 1
>
> I dont want the NA's :
> vec[vec == 1 & ! is.na(vec)]# 1 1
> is the same as
> vec[vec %in% 1] # 1 1
>
> %in% is NA-friendly :)
>
> But if i want >2 without the NA's :
>
> vec[vec>2] #3 4 5 NA NA 9 NA
>
> if i dont want the NA i have to do :
>
> vec[vec>2 & !is.na(vec)] #3 4 5 9
>
> is there an op?rator to directly do that?
>
> any idea?
>
> thx a lot.
>
--
Sarah Goslee
http://www.functionaldiversity.org