[R] Secondary Y axis title
ggrothendieck at gmail.com
Sun Oct 21 02:55:45 CEST 2007
mtext does not support srt -- use text instead. There is a comment about
that in the example although perhaps the wording could be clearer.
On 10/20/07, Dave Hewitt <dhewitt at vims.edu> wrote:
> The controls for the margin sizes, which set the amount of space allocated
> for the labels, are the 'mai' numbers in the first 'par' call. The fourth
> number changed to 0.9 or greater should give you more room like you're
> looking for.
> You can use the alternative 'mtext' way of adding the label (it's simpler),
> which I have used below to make the right label appear the same distance
> from the axis as the left label (option "line = 3"). I don't see how to
> adjust the reading direction of the label to be top-to-bottom with 'mtext',
> so I guess you'll need the 'text' way of doing it if you want that
> orientation (although I don't understand the 'usr' positions that define
> the location).
> Gabor, do you know how to change the reading direction with 'mtext'? I
> tried 'srt' and that did not work.
> z <- zoo(cbind(A = cumsum(rnorm(100)), B = cumsum(rnorm(100, mean = 0.2))))
> par(mai = c(.8, .8, .2, .9)) # Or change '.9' to a larger number for even
> more room (the units are inches)
> plot(z[,1], type = "l", xlab = "X axis label", ylab = colnames(z), lty =
> 1, lwd = 2)
> par(new = TRUE)
> plot(z[,2], type = "l", ann = FALSE, yaxt = "n", col = "blue", lty = 2, lwd
> = 2)
> legend(x = "topleft", bty = "n", lty = c(1,2), lwd = c(2,2),
> col = c("black", "blue"), legend = paste(colnames(z), c("(left
> y-axis)", "(right y-axis)")))
> mtext(colnames(z), 4, line = 3, col = "blue")
> At 11:42 PM 10/20/2007 +0200, John Theal wrote:
> >I still haven't resolved this problem. However, when I run the plot.zoo
> >example the label appears, it also appears if I enter the commands
> >manually. The problem that persists is that the label has to lie so close
> >to the secondary y axis, that (in my case) it becomes almost
> >indistinguishable from the axis scale labels. If the label is long, then
> >it over-writes some of the scale labeling. I thought it might be do to
> >the way the Quartz window manager handles the figure margins (under Mac OS
> >X), but it looks as though maybe this is not the case.
> >I'm running the same versions of R (2.6.0, unpatched) and zoo (1.4-0) as
> >Gabor. I am using R under Mac OS X.
> >Dave Hewitt wrote:
> >>I was curious about the exact same question that John Theal posed - how
> >>to get a second y-axis label for a plot of two data series against a
> >>common x (in my case, time).
> >>I tried two different methods - one in lattice and one in plot. Both
> >>times the y-axis on the right side appears but the label does not.
> >>Similar to John's comment, it appears that there is not enough room for
> >>the label.
> >>Gabor mentioned that the plot.zoo examples give a plot like this. When I
> >>run that series of examples, #7 appears to be what Gabor was referring
> >>to, but even there the label for the right-hand y-axis is missing.
> >>Dave Hewitt
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