There are 7 rows since this is probably a data frame and each column in a dataframe (or a matrix in this case) all have the same number of rows. I think what you want is to 'sum' the number of times a condition is met; this might come closer to what you were expecting:
sum(weekly$a != 0) On Sat, Mar 22, 2008 at 6:16 PM, Felipe Carrillo <[EMAIL PROTECTED]> wrote: > Hi all: > Can someone help me count the > number of rows with values in > colum "a" only. assume the name > of my dataframe is "weekly" > I was trying > i<- nrows(weekly$a) > i > but returns 7 when it should > be 4. Thanks > a b c d > 27.000 > 27.000 > 1.569 0.013 160.000 27.000 > 1.632 0.013 146.000 27.000 > 1.830 0.015 70.000 27.000 > 2.475 0.019 156.000 27.000 > 27.000 > > Felipe D. Carrillo > Fishery Biologist > Department of the Interior > US Fish & Wildlife Service > California, USA > > > > > ____________________________________________________________________________________ > Be a better friend, newshound, and > > ______________________________________________ > 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.
