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

[arun]

HI,

Infact, there is no need for aggregate().
dat1$range<-cut(dat3$Percent,breaks=c(-Inf,0,25,50,75,100),labels=c("<=0","0-25","25-50","50-75",">75"))
 dat1
#  Area Percent range
#1  456       0   <=0
#2 3400      10  0-25
#3   79      25  0-25
#4   56      18  0-25
#5  467       0   <=0
#6   67      67 50-75
#7  839      85   >75
#8 1120       0   <=0
#9 3482      85   >75
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]]


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