[R] converting strings to expressions

Prof Brian Ripley ripley at stats.ox.ac.uk
Thu Sep 14 22:20:40 CEST 2006

On Thu, 14 Sep 2006, Deepayan Sarkar wrote:


> Ah, I'd forgotten about parse. A link from ?expression might be reasonable.

But it says


      'Expression' here is not being used in its colloquial sense, that
      of mathematical expressions.  Those are calls (see 'call') in R,
      and an R expression vector is a list of calls, typically as
      returned by 'parse'.

so it already has a link.

'Expression' was often misused in the R documentation, and a couple of 
months ago I tried to move to a more careful usage.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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