Thank you very much Michael. This is very helpful. However, if there is any
way to exclude zero length bins. Lets imagine that the matrix was as
follows -

a <- data.frame(patient=1:7, charges=c(100,500,200,90,400,500,600),
 age=c(0,3,5,7,10,16,19),  spending=c(10, 60, 110, 200, 400, 450, 500))

bins <- split(a, cut(a$spending, breaks = (0:5)*100)

then bins[3] =
$`(200,300]`
[1] patient  charges  age      spending
<0 rows> (or 0-length row.names)

Is there a way to exclude this?

Priya

On Mon, Dec 5, 2011 at 3:43 PM, R. Michael Weylandt <
michael.weylandt@gmail.com> wrote:

> Just a clarification: I can't get round to work as I first expected so
> if you want to do bins by 100's you'd probably want:
>
> split(a, cut(a$spending, breaks = (0:5)*100))
>
> Michael
>
> On Mon, Dec 5, 2011 at 3:41 PM, R. Michael Weylandt
> <michael.weylandt@gmail.com> wrote:
> > I'd so something like
> >
> > split(a, a$spending)
> >
> > and you can include a round(a$spending, -2) or something similar if
> > you want to group by the 100's.
> >
> > Michael
> >
> > On Mon, Dec 5, 2011 at 3:37 PM, Diviya Smith <diviya.smith@gmail.com>
> wrote:
> >> Hello there,
> >>
> >> I have a matrix with some data and I want to split this matrix based on
> the
> >> values in one column. Is there a quick way of doing this? I have looked
> at
> >> cut but I am not sure how to exactly use it?
> >> for example:
> >>
> >> I would like to split the matrix "a" based on the spending such that the
> >> data is binned groups [0..99],[100..199]...and so on.
> >>
> >> a <- data.frame(patient=1:7, charges=c(100,500,200,90,400,500,600),
> >>  age=c(0,3,5,7,10,16,19),  spending=c(10, 60, 110, 200, 250, 400, 450))
> >>
> >> Expected  output -
> >> bin[1] <- c(10, 60)
> >> bin[2] <- c(110, 200, 250)
> >> bin[3] <- c(400, 450)
> >>
> >> NOTE that the number of data points in each bin is not the same and the
> >> empty bins are removed (since there are no points between [199..299],
> >> bin[3] starts at 400.
> >>
> >> Any help would be most appreciated. Thank you in advance.
> >>
> >> Diviya
> >>
> >>        [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help@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.
>

	[[alternative HTML version deleted]]

