repeating a row to fill in missing row values in R

Question

I have a dataset that looks like this

left	center	right
One	data	data
	data	data
	data	data
	data	data
Two	data	data
	data	data
	data	data
	data	data
Three	data	data
	data	data
	data	data
	data	data

What I need it to do is to look like this

left	center	right
One	data	data
One	data	data
One	data	data
One	data	data
Two	data	data
Two	data	data
Two	data	data
Two	data	data
Three	data	data
Three	data	data
Three	data	data
Three	data	data

The core issue as you can see is that I have a single value that is only within one row but needs to be in all the associated rows.

Answer 1

You can use the fill function from the tidyr library

fill(dataset, left , .direction = "down")