R - na by column r - Code Answer

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na by column r

df <- data.frame(x = c(1,2,NA), y = rep(NA, 3))

# Which column has na?
colSums(is.na(df))[colSums(is.na(df)) > 0]

# which rows?
df[which(rowSums(is.na(df)) > 0),]

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na by column r

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