On Nov 22, 2009, at 4:57 PM, Peter Ehlers wrote:
Hi Ted,
This won't solve your problem, but a small improvement might
be to place the labels over the lines rather than the other
way around. It will definitely avoid putting red lines over
black ones:
x <- -6:16
z <- outer(x,x)
contour(z, labels="", col=2)
contour(z, lty=0, labcex=1, add=TRUE)
I played around a bit with you example, and can get almost the desired
color and lack of cutting through labels. There is the possibility of
plotting empty labels that create a space in the curves for the later
labels-without-lines overlay:
x <- -6:16
z <- outer(x,x)
contour(z, labels=" ", col=2, labcex=1.5, drawlabels=TRUE)
contour(z, lty=0, labcex=1.5, add=TRUE)
Cheers,
Peter
(Ted Harding) wrote:
Greetings, All!
I want to draw contour lines in red, using contour(), but also
have the contour labels (for the level-values) in black so that
they will stand out against a coloured background already generated
using filled.contour() (the background shades from green at low
levels of "risk" to red at high levels).
In any case, contour labels in red are already somewhat inconspicuous
with contour lines in red, regardless of background.
I see nothing in ?contour nor in ?par about this.
One way to approach it could be to first draw the labelled contours
in black, and then overlay by re-drawing (with out labels) in red.
This would sort-of work, but the red contour lines would then cut
through the black numbers, which is somewhat undesirable. Also
(I've tried it) you can get show-through along the contour lines
from the black layer, which is nasty.
Any suggestions?
With thanks,
Ted.
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E-Mail: (Ted Harding) <ted.hard...@manchester.ac.uk>
Fax-to-email: +44 (0)870 094 0861
Date: 22-Nov-09 Time: 17:06:08
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