[R] SApply versus for loop for list of data.frames

[rivercode]

Hi,

I am trying to find the total number of rows for a list of data.frames and
want to know if there is a better way than using a loop like:

>df = { list of data.frame with varying number of rows...each one has a
column called "COL" }
>r = 0
> for (i in 1:length(df)) {
+ r = r + length(n[[i]]$CON)
+ }
> r
6000123   <----  number of rows.

Thanks,
Chris

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