Re: [R] Grouping by interval

From: Benilton Carvalho <bcarvalh_at_jhsph.edu>
Date: Fri, 7 Dec 2007 08:43:22 -0500

Check the cut() function.
b

On Dec 7, 2007, at 4:04 AM, "Sonia Mehault" <mehault_at_iim.csic.es> wrote:

> Hello,
>
> I have a dataframe of say 20 lines with one line per individual. I
> want to group these 20 individuals
> by length class (eg. of 5cm) and get the mean value of all the other
> variables (eg VarA and VarB) for each length class
>
> My dataframe is as follow:
>
> Length <- 10:30
> VarA <- seq(1000,1200,10)
> VarB <- seq(500,700,10)
> Data <- cbind(Length,VarA,VarB)
>
>
> And I want to get something like:
>
>
> Length Class Mean VarA Mean VarB
> [10-15[ 1020 520
> [15-20[ 1070 570
> [20-25[ 1120 620
> [25-30] 1175 675
>
>
> Would you have any suggestions how to do that ?
> Many thanks.
>
>
> Sonia.
>
> [[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. Received on Fri 07 Dec 2007 - 13:48:26 GMT

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