添加具有NA和均值计数的列 [英] Add a column with count of NAs and Mean

问题描述

我有一个数据框，我需要向其添加另一列，以显示该行在所有其他列中的NA计数以及非NA值的平均值. 我认为可以在dplyr中完成.

I have a data frame and I need to add another column to it which shows the count of NAs in all the other columns for that row and also the mean of the non-NA values. I think it can be done in dplyr.

> df1 <- data.frame(a = 1:5, b = c(1,2,NA,4,NA), c = c(NA,2,3,NA,NA))
> df1
  a  b  c
1 1  1 NA
2 2  2  2
3 3 NA  3
4 4  4 NA
5 5 NA NA

我想更改另一列，该列计算该行中NA的数量，而另一列则显示该行中所有NON-NA值的均值.

I want to mutate another column which counts the number of NAs in that row and another column which shows the mean of all the NON-NA values in that row.

推荐答案

library(dplyr)

count_na <- function(x) sum(is.na(x))

df1 %>%
  mutate(means = rowMeans(., na.rm = T),
         count_na = apply(., 1, count_na))

这篇关于添加具有NA和均值计数的列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！