What are simple R equivalent of Panda's fillna methods?

Question

In particular I am interested in equivalents of

df.fillna(method='ffill')

and

df.fillna(method='bfill')

Answer 1

We can use na.locf from zoo

library(zoo)
na.locf(df)

and for the second case,

na.locf(df, fromLast=TRUE)

data

set.seed(24)
df <- as.data.frame(matrix(sample(c(1:3, NA), 5*4, replace=TRUE), 5, 4))