How to replace missing values with median in an R data frame column?

To replace missing values with median, we can use the same trick that is used to replace missing values with mean. For example, if we have a data frame df that contain columns x and y where both of the columns contains some missing values then the missing values can be replaced with median as df$x[is.na(df$x)]<-median(df$x,na.rm=TRUE) for x and for y we can do the same as df$y[is.na(df$y)]<-median(df$y,na.rm=TRUE).

Example

df2$Ratings[is.na(df2$Ratings)]<-median(df2$Ratings,na.rm=TRUE)
df2

Output

ID Ratings
1 1 3.0
2 2 1.0
3 3 1.0
4 4 4.0
5 5 1.0
6 6 4.0
7 7 2.0
8 8 3.0
9 9 2.0
10 10 2.0
11 11 3.0
12 12 5.0
13 13 5.0
14 14 1.0
15 15 4.0
16 16 1.0
17 17 4.0
18 18 2.5
19 19 1.0
20 20 2.5