[R] histogram

[David Winsemius]

On Oct 8, 2009, at 3:47 PM, Khanh Nguyen wrote:

> Hi all,
>
> I have a question about hist()
>
> 1)
>> t1 <- hist(c(1,2,3,4,5))
>> t1
> $breaks
> [1] 1 2 3 4 5
>
> $counts
> [1] 2 1 1 1
>
> why is there 2 counts for 1? And should the counts be '1 1 1 1 1' ?

It depends on the way the bins are defined.

Had you forced a particular set of breaks you would get a different  
set of bin boundaries.

t1 <- hist(c(1,2,3,4,5), breaks=c(1,2,3,4,5,6)-.1)

>
> Is there any other function to count frequency of discrete data?

?table

 > table(c(1,2,3,4,5))

1 2 3 4 5
1 1 1 1 1

> Thanks.
>
> -k
>
> 	[[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.

David Winsemius, MD
Heritage Laboratories
West Hartford, CT