[R] what is the "NOT IN" operator

[Bill.Venables at csiro.au]

Try !(group %in% C("A", ...))

A slightly cuter way is to define your own operator.

> `%ni%` <- Negate(`%in%`)
> letters[1:3] %ni% letters[3:5]
[1]  TRUE  TRUE FALSE
> 


________________________________________
From: r-help-bounces at r-project.org [r-help-bounces at r-project.org] On Behalf Of Emily Deomano [EDeomano at bses.com.au]
Sent: 07 October 2010 09:17
To: r-help at r-project.org
Subject: [R] what is the "NOT IN" operator

Good day,
I need to subset a data by removing several rows.  I know the %in% operator, i.e.

sub <- mydata[group %in% c("A","B","E","G"), ]

What I need is the opposite, that is remove rows and/or columns.  What is the operator for "NOT IN"?  I tried  (i)! %in% and (ii) ^%in% and both resulted in a "could not find function" error.


Kind Regards

Emily Deomano  |  Biometrician
BSES Limited  |  ABN 29 103 760 005  |  PO Box 86  |  50 Meiers Road  |  Indooroopilly Q 4068 Australia
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