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Turns implicit missing values into explicit missing values.
complete(.df, ..., fill = list(), .by = NULL)
A data.frame or data.table
Columns to expand
A named list of values to fill NAs with.
Columns to group by
df <- data.table(x = 1:2, y = 1:2, z = 3:4) df %>% complete(x, y) df %>% complete(x, y, fill = list(z = 10))
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