[R] For Loop help needed

[Allan Engelhardt]

One option:

t <- data.frame(x1=c(1,1,0,0,0,1), x2=c(0,0,0,1,0,1), 
Count=c(523,23,2,45,3,433))
t.sum <- function(df, x1, x2) sum(df[df$x1==x1 & df$x2==x2,]$Count)
t.sum(t, 1, 0)
# [1] 546
t.sum(t, 0, 0)
# [1] 5

Hope this helps a little.

Allan

On 03/06/10 16:18, Geeti Khan wrote:
> Hi,
> I have a dataset with three column like this
> x1 x2 Count
> 1  0  523
> 1 0 23
> 0 0 2
> 0 1  45
> 0 0  3
> 1 1 433
>
> I need to create a loop so that when c(x1,x2)=c(1,1), I can add the corresponding Counts.When c(x1,x2)=c(1,0), can add the corresponding counts and so on. Can anyone help me????
>
>
>
>
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