8 numNA()
Similar to Stata,4 numNA counts the number of missing values: if m is set to 1, then it counts the number of missing values per row; if set to 2, then it counts the number of missing values per column; otherwise, it counts the total number of missing values.
## [1] 448.1 rowNA()/colNA()
The function rowNA() is the equivalent of numNA(x, 1), where x is a data frame. It counts the number of missing values per row. The function colNA() does the same but per column.
## [1] 0 0 0 0 2 1 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 0 0 0 0 1 1 1 1 1 1
## [38] 0 1 0 0 1 1 0 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 1 0 0 0 0 0 0 1 0 0
## [75] 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 0 0 0 1 0 0 0 0
## [112] 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
## [149] 0 1 0 0 0## Ozone Solar.R Wind Temp Month Day
## 37 7 0 0 0 0