[R] draw categorical histogram

[Andrew Miles]

Phoebe,

In addition to the barplot method below, you really can use plot() to  
draw what it sounds like you are looking for IF you have a categorical  
variable.  To illustrate, try running the following code:

x=sample(c("Richard", "Minnie", "Albert", "Helen", "Joe", "Kingston"),  
50, replace=T)
x=as.factor(x)
plot(x)

See also ?plot.factor

Andrew Miles


On Dec 1, 2010, at 4:06 PM, Jorge Ivan Velez wrote:

> Hi Phoebe,
>
> Try
>
> x <- c(12, 33, 56, 67, 15, 66)
> names(x) <- c('Richard','Minnie','Albert','Helen','Joe','Kingston')
> barplot(x, las = 1, space = 0)
>
> HTH,
> Jorge
>
>
> On Wed, Dec 1, 2010 at 2:51 PM, phoebe kong <> wrote:
>
>> Hi,
>>
>> Can someone tell me how to draw a histogram for the following  
>> summary?
>>
>> Richard   Minnie  Albert  Helen  Joe  Kingston
>>       12        33       56       67    15           66
>>
>> The summary tell that Richard has occurrence 12, Minnie has  
>> occurrence 33,
>> and so on. I would like to view this summary in a histogram.
>>
>> I want the X-axis be the person name (Richard, Minnie, ....), Y- 
>> axis be the
>> frequency (12, 33....).
>> How can I make the histogram has 6 bars, each bar was named as  
>> Richard,
>> Minnie, ... ,  Kingston?
>>
>> Thanks,
>> Phoebe
>>
>>       [[alternative HTML version deleted]]
>>
>> ______________________________________________
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>> 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.
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.