On Oct 12, 2010, at 12:16 AM, rivercode wrote:
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.
r <- lapply(df, NROW)
r
--
David.
______________________________________________
R-help@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.
