Top "Na" questions

NA is a missing value indicator (Not Available) in the R language.

How to remove row if it has a NA value in one certain column

My data called "dat": A B C NA 2 NA 1 2 3 1 NA 3 1 2 3 I want to be all rows to be removed if …

r na
Counting non NAs in a data frame; getting answer as a vector

Say I have the following R data.frame ZZZ: ( ZZZ <- structure(list(n = c(1, 2, NA), m = c(6, NA, …

r na
Remove columns from dataframe where some of values are NA

I have a dataframe where some of the values are NA. I would like to remove these columns. My data.…

r dataframe na
ignore/remove NA values in read.csv

I have a csv file as shown below that I read into R using read.csv, where column C has 12/30 …

r na read.csv
Count NAs per row in dataframe

I've got dataframe that has batch ID and the results of six tests performed on each batch. The data looks …

r dataframe na
Correct syntax for mutate_if

I would like to replace NA values with zeros via mutate_if in dplyr. The syntax below: set.seed(1) mtcars[…

r dplyr na
Find columns with all missing values

I am writing a function, which needs a check on whether (and which!) column (variable) has all missing values (NA, &…

r dataframe na
Find names of columns which contain missing values

I want to find all the names of columns with NA or missing data and store these column names in …

r na
Finding the index of an NA value in a vector

I have the following vector: x <- c(3, 7, NA, 4, 8) And I just want to know the index of the …

r vector na
How to remove NA values in vector in R

I have a vector which stores over 1000 values. The first 50 values are NAs, how can I get rid of it? …

r vector numeric na