R-how to group the data
On 12/9/05 7:19 AM, "Subhabrata" <subhabratapal at sraindia.com> wrote:
Hello R - users,
This may sound simple to may people:
I have a list of data as follows
type value
y 7
y 7
y 8
y 8
y 8
y 9
y 9
y 9
y 9
y 10
y 10
y 10
y 10
y 11
y 11
y 12
y 12
y 14
y 14
y 14
y 15
y 17
y 20
y 20
y 20
y 20
y 25
y 25
y 25
x 7
x 7
x 8
x 8
x 9
x 9
x 11
x 11
x 11
x 12
x 12
x 12
x 13
x 13
x 15
x 15
x 15
x 18
x 20
x 30
x 30
Is there any way where I can group all the x and y like
a <- all the values of x
b <- all the values of y
so 'a' will have = 7, 7, 8....
'b' = 7,7,8,8,8...
Look at ?split.
vec <- c(1,2,3,4,5,10,11,12,13,14,15,16)
myletters <- c(rep('a',5),rep('b',7))
mylist <- split(vec,myletters)
mylist$a
mylist$b
Sean