R help - Dec 2011 - Binning the data based on a value

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]]

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 at 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]]
>
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