counting values on one colum only
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$a != 0) On Sat, Mar 22, 2008 at 6:16 PM, Felipe Carrillo
<mazatlanmexico at yahoo.com> wrote:
Hi all:
Can someone help me count the
number of rows with values in
colum "a" only. assume the name
of my dataframe is "weekly"
I was trying
i<- nrows(weekly$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 at 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?