R: Change every 5th value in a column in a data frame
Question
I have a data frame uploaded from excel with 10 columns and 100 rows, and all the data is 0. Now I would like to change every 5th value in the second column to 1. Is this possible? If so, how?
1 answers
solution1
1 2017-11-10 15:39:33
使用seq一种方法是df[seq(from = 5, to = nrow(df), by = 5), 2] <- 1
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