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How to selectively sum rows [Beginner question]
Aaron Siirila
·
Oct 24, 2011
·
r-help
Sorry, I attempted to paste the sample data but it must have been stripped out when I posted. It is hopefully now listed below. tapply looks useful. I will check it out further. Here's the sample data: > flights[1...
How to selectively sum rows [Beginner question]
Aaron Siirila
·
Oct 24, 2011
·
r-help
The count() function in the plyr package works beautifully. Thanks to Jim, Rainer and Dennis for your help. Best. -----Original Message----- From: Dennis Murphy [mailto:djmuser at gmail.com] Sent: Monday, October 24, 2011 12:05 PM To: asindc Cc...
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