MichaelChirico
commented
4 years ago From: Martin Maechler <maechler@<::CENSORED -- SEE ORIGINAL ON BUGZILLA::>> 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).
Martin Maechler
>>>> "MM" == Martin Maechler <maechler@<::CENSORED -- SEE ORIGINAL ON BUGZILLA::>>
>>>> on Tue, 13 Jul 2004 18:22:05 +0200 (CEST) writes: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> ______________________________________________
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- Comment author - Jitterbug compatibility account
- Timestamp - 2004-08-19 21:13:56 UTC
From: Martin Maechler <maechler@<::CENSORED -- SEE ORIGINAL ON BUGZILLA::>> Not a bug necessarily, in text(), but at least an inconsistency, and a need for more documentation: Contrary to e.g., plot(), text(x,y,labels) does recycle it's arguments to some extent -- and probably has always in S.
However it doesn't do all I think it should, i.e.,
plot(1:7); text(1:2, 1+ 1:3, LETTERS[1:4])
does recycle 'x' to c(1:2, 1) {length 3} to match 'y' but doesn't recycle to length 4 in order to match 'labels'.
While one can well accept this, I believe it should give a warning since it silently 'drops' the "d".
However, I'm proposing to consider S(-plus) compatibility here. In S-PLUS 6.1, the result of the above is identical to plot(1:7); text(rep(1:2,length=4), rep(1+ 1:3, length=4), LETTERS[1:4]) i.e. (x,y) is recycled to length 4, the length of 'labels'.
Further note that in plot(1:7); text(1:2, 1+ 1:3, LETTERS[1:2], col=2:6) the 'labels' are recycled to length 3, matching (x,y) -- but not to length 5 of 'col' which is fine -- just not the other way around.
I'd propose that R should recycle all three (x,y,labels) [but not more] to common length.
BTW, "grid" graphics do recycle as well, at least
grid.text(labels, x, y) does --- and as I see it does also recycle at least the 'rotation'.
Martin Maechler
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