From pdalgd at gmail.com  Sun Feb  7 15:15:38 2016
From: pdalgd at gmail.com (peter dalgaard)
Date: Sun, 7 Feb 2016 15:15:38 +0100
Subject: [Rd] Assignment in environment
In-Reply-To: <56B74AC7.4010901@gmail.com>
References: <1454850489.16166.0@physik.uni-freiburg.de>
	<56B74AC7.4010901@gmail.com>
Message-ID: <1CDE0F5D-35D3-4315-AC08-7953DAD81914@gmail.com>


> On 07 Feb 2016, at 14:46 , Duncan Murdoch <murdoch.duncan at gmail.com> wrot8[e:
> 
[snippage]
> 
> but in fact, this doesn't work:
> 
> getValue(fn)[[1]] <- 3
> Error in getValue(fn)[[1]] <- 3 : could not find function "getValue"
> 
> I suspect this is a parser problem.

Umm, no...

The canonical semantics are that 

foo(x)[[....]] <- bar

is internally converted to

*tmp* <- foo(x)
*tmp*[[....]] <- bar
x <- `foo<-`(x, *tmp*)

so both foo() and `foo<-` are required.

-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com



[Rd] Assignment in environment
peter dalgaard