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2009 Apr 09
2
how to automatically select certain columns using for loop in dataframe
Hi, I am trying to display / print certain columns in my data frame that share certain condition (for example, part of the column name). I am using for loop, as follow: # below is the sample data structure all.data <- data.frame( NUM_A = 1:5, NAME_A = c("Andy", "Andrew", "Angus", "Alex", "Argo"), NUM_B = 1:5, NAME_B = c(NA, "Barn", "Bolton", "Bravo", NA), NUM_C = 1:5, NAME_C = c("Candy", NA, &q...