[R] counting the number of ones in a vector
dreinke at dowlinginc.com
Fri Feb 26 19:43:56 CET 2010
The length will remain the same no matter what expression appears in the subscript. I suggest this:
sum(x == 1)
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From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Randall Wrong
Sent: Friday, February 26, 2010 6:44 AM
To: r-help at r-project.org
Subject: [R] counting the number of ones in a vector
Dear R users,
I want to count the number of ones in a vector x.
That's what I did : length( x[x==1] )
Is that a good solution ?
Thank you very much,
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