Description Usage Arguments Details References Examples
Here's a version that works with log-scale and linear scale axes. The trick is to express line locations in npc coordinates rather than user coordinates, since the latter are of course not linear when axes are on log scales.
1 |
line |
integer |
side |
integer; 1-4 |
par('cin')[2] * par('cex') * par('lheight')
returns the current line height
in inches, which we convert to user coordinates by multiplying by
diff(grconvertX(0:1, 'inches', 'user'))
, the length of an inch in user
coordinates (horizontally, in this case - if interested in the vertical
height of a line in user coords we would use
diff(grconvertY(0:1, 'inches', 'user')))
.
https://stackoverflow.com/questions/29125019/get-margin-line-locations-mgp-in-user-coordinates
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | setup_plot <- function(log = "") {
par(mar = c(2, 10, 2, 2), oma = rep(2, 4))
plot.new()
plot.window(xlim = c(1, 10), ylim = c(1, 10), log = log)
box(which = "plot", lwd = 2, col = "gray40")
box(which = "figure", lwd = 2, col = "darkred")
box(which = "outer", lwd = 2, col = "darkgreen")
text(x = 0.5, y = 0.5,
labels = "Plot Region",
col = "gray40", font = 2)
mtext(side = 3, text = "Figure region", line = 0.5, col = "darkred", font = 2)
mtext(side = 3, text = "Device region", line = 2.5, col = "darkgreen", font = 2)
for (i in 0:9) {
mtext(side = 2, col = "darkred", text = paste0("Line", i), line = i)
}
}
# And here are a couple of examples, applied to your setup_plot with mar=c(5, 5, 5, 5):
setup_plot()
axis(1, line=5)
axis(2, line=5)
abline(h=line2user(0:4, 1), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 2), lty=3, xpd=TRUE)
abline(h=line2user(0:4, 3), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 4), lty=3, xpd=TRUE)
setup_plot(log='x')
axis(1, line=5)
axis(2, line=5)
abline(h=line2user(0:4, 1), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 2), lty=3, xpd=TRUE)
abline(h=line2user(0:4, 3), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 4), lty=3, xpd=TRUE)
setup_plot(log='y')
axis(1, line=5)
axis(2, line=5)
abline(h=line2user(0:4, 1), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 2), lty=3, xpd=TRUE)
abline(h=line2user(0:4, 3), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 4), lty=3, xpd=TRUE)
setup_plot(log='xy')
axis(1, line=5)
axis(2, line=5)
abline(h=line2user(0:4, 1), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 2), lty=3, xpd=TRUE)
abline(h=line2user(0:4, 3), lty=3, xpd=TRUE)
abline(v=line2user(0:4, 4), lty=3, xpd=TRUE)
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