From: <maechler_at_stat.math.ethz.ch>

Date: Fri 20 Aug 2004 - 23:05:07 EST

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MM> However it doesn't do all I think it should, i.e.,

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MM> plot(1:7); text(1:2, 1+ 1:3, LETTERS[1:4])

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MM> does recycle 'x' to c(1:2, 1) {length 3} to match 'y' MM> but doesn't recycle to length 4 in order to match 'labels'.

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MM> While one can well accept this, I believe it should give a MM> warning since it silently 'drops' the "d".

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MM> I'd propose that R should recycle all three (x,y,labels) MM> [but not more] to common length.

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MM> Martin Maechler

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* >> ______________________________________________
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>> R-devel@stat.math.ethz.ch mailing list

* >> https://stat.ethz.ch/mailman/listinfo/r-devel
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R-devel@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-devel Received on Fri Aug 20 23:07:56 2004

Date: Fri 20 Aug 2004 - 23:05:07 EST

>>>>> "BDR" == Prof Brian Ripley <ripley@stats.ox.ac.uk>
>>>>> on Thu, 19 Aug 2004 17:50:13 +0100 (BST) writes:

BDR> On Thu, 19 Aug 2004 maechler@stat.math.ethz.ch wrote:

>> I didn't get any feedback on this posting,

* >>
** >> so I will commit my proposal to recycle the coordinates (x,y) to
** >> the length of 'labels' if the latter is longer (instead of
** >> silently dropping the extra labels[] entries).
*

BDR> I'd suggest only doing non-fractional recycling (or at the very least BDR> warning against fractional recycling). I would expect almost all BDR> occurrences of your example would be unintended.

well, as said, both "grid" and S-plus do recycle (w/o warning) in this situation.

Do we have precedence cases of "recycling but warn if fractional" ?

Martin

>> >>>>> "MM" == Martin Maechler <maechler@stat.math.ethz.ch>

* >> >>>>> on Tue, 13 Jul 2004 18:22:05 +0200 (CEST) writes:
** >>
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MM> Not a bug necessarily, in text(), but at least an inconsistency, MM> and a need for more documentation: Contrary to e.g., plot(), MM> text(x,y,labels) *does* recycle it's arguments to some extent -- MM> and probably has always in S.

MM> However it doesn't do all I think it should, i.e.,

MM> plot(1:7); text(1:2, 1+ 1:3, LETTERS[1:4])

MM> does recycle 'x' to c(1:2, 1) {length 3} to match 'y' MM> but doesn't recycle to length 4 in order to match 'labels'.

MM> While one can well accept this, I believe it should give a MM> warning since it silently 'drops' the "d".

MM> However, I'm proposing to consider S(-plus) compatibility here. MM> In S-PLUS 6.1, the result of the above is MM> identical to MM> plot(1:7); text(rep(1:2,length=4), rep(1+ 1:3, length=4), LETTERS[1:4]) MM> i.e. (x,y) is recycled to length 4, the length of 'labels'.

MM> Further note that in MM> plot(1:7); text(1:2, 1+ 1:3, LETTERS[1:2], col=2:6) MM> the 'labels' *are* recycled to length 3, matching (x,y) -- but MM> not to length 5 of 'col' which is fine -- just not the other way around.

MM> I'd propose that R should recycle all three (x,y,labels) MM> [but not more] to common length.

MM> BTW, "grid" graphics do recycle as well, at least MM> grid.text(labels, x, y) does --- and as I see it does also MM> recycle at least the 'rotation'.

MM> Martin Maechler

MM> ______________________________________________MM> R-devel@stat.math.ethz.ch mailing list MM> https://www.stat.math.ethz.ch/mailman/listinfo/r-devel

>> R-devel@stat.math.ethz.ch mailing list

BDR> -- BDR> Brian D. Ripley, ripley@stats.ox.ac.uk BDR> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ BDR> University of Oxford, Tel: +44 1865 272861 (self) BDR> 1 South Parks Road, +44 1865 272866 (PA) BDR> Oxford OX1 3TG, UK Fax: +44 1865 272595 BDR> ______________________________________________BDR> R-devel@stat.math.ethz.ch mailing list BDR> https://stat.ethz.ch/mailman/listinfo/r-devel

R-devel@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-devel Received on Fri Aug 20 23:07:56 2004

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