[Rd] Use of all/any

Bill Dunlap bill at insightful.com
Fri Oct 26 21:53:46 CEST 2007

On Fri, 26 Oct 2007, Bill Dunlap wrote:

> In Splus I use
>    rapply(expr, classes="call",
>      f=function(x)if(isComparisonOfAnyOrAll(x))deparseText(x))
> to rattle down an an expression tree looking for this pattern.
> However's R's rapply won't let me do that because
> it insists its input be a function instead of being of
                         oops, "a list", not "function"
> recursive type.  Its help file says it evaluates the arguments
> to f() even if they are expressions, and that may contribute
> to problems.  The Splus rapply accepts any recursive type and it does not
> evaluate the subtrees that it hands to f().

Bill Dunlap
Insightful Corporation
bill at insightful dot com

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