[R] add values in one column getting range from other column

[Rui Barradas]

Hello,

Maybe this time you've got it wrong, Arun. The op wants to sum the 
areas, not just label them.
Using your code,


Range=cut(dat1$Percent, breaks=c(-Inf,0, 25, 50, 75, 100),
         labels=c("<=0", "0-25", "25-50", "50-75", ">75"))
aggregate(Area ~ Range, data = dat1, FUN = sum)

#  Range Area
#1   <=0 2043
#2  0-25 3535
#3 50-75   67
#4   >75 4321

Hope this helps,

Rui Barradas
Em 03-10-2012 01:43, arun escreveu:
> Hi,
> I guess this is what you wanted:
> dat1<-read.table(text="
> Area Percent
> 456       0
>
> 3400      10
>
> 79          25
>
> 56           18
>
> 467         0
>
> 67          67
>
> 839        85
>
> 1120      0
>
> 3482      85
> ",sep="",header=TRUE)
>   aggregate(dat1$Percent, list(Area = dat1[,"Area"],Range=cut(dat1
>   $Percent,breaks=c(-Inf,0, 25, 50, 75, 100),
>     labels=c("<=0", "0-25", "25-50", "50-75", ">75"))),function(x) x)
> #  Area Range  x
> #1  456   <=0  0
> #2  467   <=0  0
> #3 1120   <=0  0
> #4   56  0-25 18
> #5   79  0-25 25
> #6 3400  0-25 10
> #7   67 50-75 67
> #8  839   >75 85
> #9 3482   >75 85
>
>
> A.K.
>
>
>
> ----- Original Message -----
> From: Sapana Lohani <lohani.sapana at ymail.com>
> To: R help <r-help at r-project.org>
> Cc:
> Sent: Tuesday, October 2, 2012 5:25 PM
> Subject: [R] add values in one column getting range from other column
>
> Hi,
>
> My dataframe has two columns one with area and other with percent. How can i add the areas that are within a range of percentage??
>
> My dataframe looks like
> Area Percent
> 456       0
>
> 3400      10
>
> 79          25
>
> 56           18
>
> 467         0
>
> 67          67
>
> 839        85
>
> 1120      0
>
> 3482      85
>
> I want to add the area for values whose percent is <0, 0-25, 25-50, 50-75, >75. How can I do that???
>      [[alternative HTML version deleted]]
>
>
> ______________________________________________
> R-help at r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
> ______________________________________________
> 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.