How can you find total number of null values in a dataset column wise

Question

I have a dataset with say 10 different columns I want to know how many null values does each column has

Answer 1

You can write a custom sapply function for this

sapply(data_frame,function(x) {sum(is.na(x))})

This would return list of number of columns missing in each of the columns hope this helps

Answer 2

data['Column Name'].isnull().sum()