replicate – IT Nursery

Repeat each row of data.frame the number of times specified in a column

June 3, 2022 by IT Nursery

df <- data.frame(var1 = c(‘a’, ‘b’, ‘c’), var2 = c(‘d’, ‘e’, ‘f’), freq = 1:3) What is the simplest way to expand each row the first two columns of the data.frame above, so that each row is repeated the number of times specified in the column ‘freq’? In other words, go from this: df var1 … Read more

Create list of single item repeated N times

April 28, 2022 by IT Nursery

I want to create a series of lists, all of varying lengths. Each list will contain the same element e, repeated n times (where n = length of the list). How do I create the lists, without using a list comprehension [e for number in xrange(n)] for each list? 8 s 8 You can also … Read more