search for: randomsample1

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2009 Mar 19
2
Randomly splitting a data frame in half
I have a data frame in long format and I would like to randomly divide this data frame in half. The data frame consists of 39622 rows and I initially tried ... randomsample1 <- data[sample(nrow(data),19811), ] Where allows me to randomly select half of the rows and assign them to randomsample1 but then I couldn't figure out how to select those rows that were not selected and assign them to randomsample2. Please cc me if you reply as I'm a digest subscrib...