[R] How to suppress factor labels

[Ista Zahn]

On Wed, Jun 8, 2011 at 5:02 PM, James Rome <jamesrome at passur.com> wrote:
> I think the issue is that the x axis is a factor.

Rather the opposite I think. In the data you sent, time is numeric,
not a factor. This works for me:

qplot(factor(time), error, data=times, size=I(1), geom="boxplot") +
	facet_wrap(~ runway, ncol=2) +
	scale_x_discrete(breaks = seq(from=0, to=60, by=10))

Best,
Ista


How would ggplot2 know
> 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
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>>
>>
>
>
>
>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org