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Counting number of rows with two criteria in dataframe

Ryan Utz

Wed, Jan 26, 2011 9:06 AM

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Ryan Utz Counting number of rows with two criteria in dataframe Jan 25 Henrique Dallazuanna Counting number of rows with two criteria in dataframe Jan 25 Ista Zahn Counting number of rows with two criteria in dataframe Jan 25 David Winsemius Counting number of rows with two criteria in dataframe Jan 25 Dennis Murphy Counting number of rows with two criteria in dataframe Jan 25 Matt Dowle Counting number of rows with two criteria in dataframe Jan 26 Hadley Wickham Counting number of rows with two criteria in dataframe Jan 26 Ryan Utz Counting number of rows with two criteria in dataframe Jan 26