[Rd] Defining a method that behaves like '$'?

[Romain Francois]

Le 09/07/10 14:18, Renaud Gaujoux a écrit :
>
> Hi,
>
> is there a way to define a method say '$$' that would behave like '$'
> and allow calls like 'a$$name'?
> Thanks.
>
> Renaud

No. This is not grammatically valid syntax:

 > parse( text = 'a$$name' )
Erreur dans parse(text = "a$$name") : '$' inattendu(e) dans "a$$"


But you can define custom methods for $.

setClass( "Foo", representation( n = "integer" ) )
setMethod( "$", "Foo", function(x, name ){
	function( ) rnorm( x at n )
} )
foo <- new( "Foo", n = 10L )
foo$bla( )


Romain

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Romain Francois
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