How to suppress factor labels

I think the issue is that the x axis is a factor.

which ones to drop? So it labels them all.
If I do the following, the labels get better:
? ?pp = qplot(time, error, data=times, size=I(1), geom="jitter",
main=title,
? ? ? ?ylab="Error (min)", xlab="Time before ON (min)", alpha=I(1/10),
? ? ? ?ylim=c(-30,40))
? ?pp2 = pp + with(times, facet_wrap(~ runway, ncol=2))
? ? ? ?+ scale_x_discrete(
? ? ? ? ? ?breaks = c("0", "5", "10",
"15","20","25","30","35","40","45","50","55","60"),
? ? ? ? ? ?labels=c("0", "5", "10",
"15","20","25","30","35","40","45","50","55","60"))
? ?print(pp2 + geom_boxplot(alpha=.5, color="blue",
outlier.colour="green", outlier.size=1))

But this ruins the boxplot--I get one box instead of a box at every minute.


On 6/8/2011 3:59 PM, Ista Zahn wrote:

Hi James,
It's hard for me to see where the problem might be. Please post the
data using dput() or even better, make a simplified example that
illustrates the problem without all the other stuff going on. Chances
are that in the process of making a simplified example you will find
the problem yourself.

Best,
Ista

On Wed, Jun 8, 2011 at 3:41 PM, James Rome <jamesrome at passur.com> wrote:

I actually tried that, and get the same plot if I am using it properly:

? ?title=paste("Fitted RETA predictions for ", airport, " the week of
", date, sep="")
? ?pp = qplot(time, error, data=times, size=I(1), geom="jitter",
main=title,
? ? ? ?ylab="Error (min)", xlab="Time before ON (min)", alpha=I(1/10),
color=times$runway,
? ? ? ?ylim=c(-30,40))
? ?pp2 = pp + with(times, facet_wrap(~ runway, ncol=2))
? ? ? ?+ scale_x_discrete(breaks = seq(from=0, to=60, by=5),
labels=seq(from=0, to=60, by=5))
? ?print(pp2 + geom_boxplot(alpha=.5, color="blue",
outlier.colour="green", outlier.size=1))

The x-axis is unchanged.

Thanks,
Jim
On 6/8/2011 3:31 PM, Ista Zahn wrote:

Hi Jim,

See ?scale_x_discrete

Best,
Ista

On Wed, Jun 8, 2011 at 3:26 PM, James Rome <jamesrome at gmail.com> wrote:

I am using ggplot2 to make a boxplot that overlays a scatterplot:
pp = qplot(time, error, data=times, size=I(1), geom="jitter", main=title,
? ? ? ?ylab="Error (min)", xlab="Time before ON (min)", alpha=I(1/10),
color=times$runway,
? ? ? ?ylim=c(-30,40))
? ?pp2 = pp + with(times, facet_wrap(~ runway, ncol=2))
? ?print(pp2 + geom_boxplot(alpha=.5, color="blue",
outlier.colour="green", outlier.size=1))
The x variable is a factor for every minute from 0:60. My problem is
that ggplot2 labels every factor value on the x axis, and they overlap.
How can I make ggplot2 label only, say every 5th factor value on the x axis?

Thanks,
Jim