From: Patrick Giraudoux (firstname.lastname@example.org)
Date: Sun 02 May 2004 - 18:30:39 EST
I am gradually moving from the classical R plot functions to the library Lattice
I have some questions about contourplot () and its arguments:
1/ I am working on geographical coordinates which makes necessary that the X (longitude) and Y (latitude) units be represented with
the same distance on screen. This was obtained in the classical R plots with plot.default(x,y, asp=1,...) and then contour(...,
add=T). When I try aspect=1 with contour plot, I get a square but not at all the aspect ratio I wish: 1 unit on X = one unit on Y =
the same distance on screen. What goes wrong?
2/ I would also be capable to project points and symbols on a contourplot (the equivalent of points() and symbols() after plot() and
contour()), but can hardly guess from the help how to manage with.
3/ I would also appreciate to manage the equivalent of par(mfrow=c(2,2)) -or any other numbers of screens- and have a "Trellis" plot
in each of the sub-screens. It seems that contourplot does not comply with and ignore the above parameters. Right or wrong? If so,
which approach can solve this problem?
Thanks in advance for any hint,
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