Re: [Rd] apropos changes in r-devel: intended feature or bug?

From: Martin Maechler <maechler_at_stat.math.ethz.ch>
Date: Fri 22 Dec 2006 - 08:14:18 GMT

>>>>> "DeepS" == Deepayan Sarkar <deepayan.sarkar@gmail.com>
>>>>> on Thu, 21 Dec 2006 22:07:27 -0800 writes:

    DeepS> The old apropos started with: if
    DeepS> (!is.character(what)) what <-
    DeepS> as.character(substitute(what))

    DeepS> The new one has:

    DeepS> if (character.only) stopifnot(is.character(what))     DeepS> else what <- as.character(substitute(what))

    DeepS> i.e., the check for is.character(what) is
    DeepS> missing. This has the effect that 'what' can no
    DeepS> longer be a character string generated by a function
    DeepS> call unless 'character.only = TRUE'. I don't think
    DeepS> this was intended; the change makes previously valid
    DeepS> use invalid and I can't think of a situation where it
    DeepS> is useful.

[ Did you read the corresponding NEWS entry? ]

It now parallelizes the use in library() , require() etc, and in particular does what the documentation says it does!

The old behavior was much less consistent and not according to documentation:

     apropos(lm) was equivalent to apropos("lm") but apropos(fit) gave an error.

Martin

    DeepS> -Deepayan



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