RE: [R] R annoyances

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Fri 20 May 2005 - 22:14:24 EST


> From: Robin Hankin
>
> On May 20, 2005, at 11:00 am, Jan T. Kim wrote:
>
> > On Thu, May 19, 2005 at 03:10:53PM -0400, John Fox wrote:
> >
> >> Since you can use variables named c, q, or t in any event, I don't
> >> see why
> >> the existence of functions with these names is much of an
> impediment.
> >
> > True, particularly since I'm not too likely to use these
> variables for
> > (local)
> > functions, and variables of other types don't prevent
> functions from
> > working.
> > (I thought this was a problem... I must be spoilt by
> recently having
> > to read
> > too much Matlab code, where parentheses are used to both enclose
> > subscripts and
> > parameter lists, thus rendering subscript expressions and function
> > calls
> > syntactically indistinguishable.)
>
>
> Heh, I'm a recovering Matlab user too. This is sooooooooooo true!
>
> In Matlab:
>
> f(10) # function f() evaluated at 10
> f(10) # 10th element of vector f. confusing!!
>
> R uses round brackets in two unrelated ways:
>
> 4*(1+2) --- using "(" and ")" to signify grouping
> f(8) function f() evaluated at 8.
>
> where there is no reason to use the same parenthesis symbol for both
> tasks.

The same is done in Fortran/C/C++/Java/Python and God knows how many others...  

> IMO, the only system with consistent parenthesis use is Mathematica;
>
> f[10] # function f[] evaluated at 10
> 8*(2+2) # parenthesis to override order of operations
> f[[3]] # third element of list f
>
> {} are used for sets.

Just out of curiosity, what's used for grouping expressions?

Andy  

>
>
> --
> Robin Hankin
> Uncertainty Analyst
> National Oceanography Centre, Southampton
> European Way, Southampton SO14 3ZH, UK
> tel 023-8059-7743
>
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>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 20 22:58:50 2005

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