From geoffjentry at hexdump.org  Wed Aug 21 15:56:20 2013
From: geoffjentry at hexdump.org (Geoff Jentry)
Date: Wed, 21 Aug 2013 06:56:20 -0700 (PDT)
Subject: [Rd] Extending suggestion for stopifnot
In-Reply-To: <CAPr7RtX3b5XBzgn1XT3nPcvX71G=W1CpK=tK1T3zz4zWW=pQNQ@mail.gmail.com>
References: <CAPr7RtX3b5XBzgn1XT3nPcvX71G=W1CpK=tK1T3zz4zWW=pQNQ@mail.gmail.com>
Message-ID: <alpine.DEB.2.00.1308210656030.3904@cardinals.dreamhost.com>

> first, I think it would be more useful if it had an optional character
> string, so users could write
>  stopifnot( is.matrix(m), "m is not a matrix" )

stop() allows for arbitrary strings ....



[Rd] Extending suggestion for stopifnot
Geoff Jentry