[R] plot categorical variable with percentage infomation

[Jie]

Hi Jean,

I would like to give a histogram for a categorical variable, with
x-axis be different levels, and a number of percentage showed on top
of each bar.
Thanks.

Best wishes,
Jie

On Mon, Aug 26, 2013 at 12:43 PM, Adams, Jean <jvadams at usgs.gov> wrote:
> Jie,
>
> I'm not exactly sure what you're after.  Perhaps this will help you get
> started.
>
> count <- table(a)
> prop <- count/length(a)
> b <- plot(a)
> text(b, count, prop, pos=1)
>
> Jean
>
>
> On Mon, Aug 26, 2013 at 11:27 AM, Jie <jimmycloud at gmail.com> wrote:
>>
>> Dear All,
>>
>> Suppose I have a categorical variable
>> a=as.factor(sample(1:3,10,replace=T))
>>
>> plot(a) and hist(as.numeric(a),freq=F) would give the histogram of it.
>> But I do not know how to add the counts or percentage information for
>> plot.factor().
>> hist() can do it but as a numeric variable, the x-axis is not 3
>> categories in this case.
>> Thank you for any suggestion.
>>
>> Best wishes,
>> Jie
>>
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>
>