Licz liczba wierszy z wartościami Na w kolumnie w R
#count total rows in data frame
nrow(df)
#count total rows with no NA values in any column of data frame
nrow(na.omit(df))
#count total rows with no NA values in specific column of data frame
nrow(df[!is.na(df$column_name),])
Itchy Ibex