I'm pretty sure that this is not Paul's design and he usually doesn't want
to touch base graphics.
I've added arguments lwd.ticks and col.ticks in R-devel. The simplest way
to suppress the axis line become axis(..., lwd=0, lwd.ticks=1).
On Mon, 16 Jun 2008, Peter Dalgaard wrote:
Andrew Yee wrote:
I've been trying to figure out a parameter that will let you separately
adjust the parameters for the axis line from the tick mark.
In the following example, I would like to suppress the axis line, but keep
the tick marks.
The source code is the ultimate reference. We have in do_axis in
src/main/plot.c:
if (doticks) {
gpptr(dd)->col = col;/*was fg */
GLine(axis_low, axis_base, axis_high, axis_base, NFC, dd);
for (i = 0; i < n; i++) {
x = REAL(at)[i];
if (low <= x && x <= high) {
x = GConvertX(x, USER, NFC, dd);
GLine(x, axis_base, x, axis_tick, NFC, dd);
}
}
}
and, as you see, there is no way the line parameters can change between the
GLine calls, no hope of finding a magical par() setting. So I'm afraid you
have to bite the bullet, do the relevant coordinate calculations, and use
segments() do draw the ticks. (Or try convincing Paul Murrell to change the
design, but that takes longer...).
--
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c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
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Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
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