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Frank

Member for 12 years, 9 months
Last seen more than a week ago

United States

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Jun 8, 2013

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183

Apply a function to every specified column in a data.table and update by reference

142

Select first and last row from grouped data

62

Create a dataframe with random numbers in each column

43

Why is the diag function so slow? [in R 3.2.0 or earlier]

38

Creating dummy variables in R data.table