NA.col.sums {do} | R Documentation |
NA is treated as missing value.
NA.col.sums(data)
data |
must be dataframe or matrix |
sum of missing value by column
df = data.frame(x=rep(c(1,NA,2,NA,6,NA),10),
y=rep(c(1,NA,2),20))
NA.col.sums(df)