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Internal function that is short for which(is.na(x), arr.ind = TRUE). Creates array index locations of missing values in a dataframe.
which(is.na(x), arr.ind = TRUE)
where_na(x)
a dataframe
a matrix with columns "row" and "col", which refer to the row and column that identify the position of a missing value in a dataframe
which_na()
# NOT RUN { where_na(airquality) where_na(oceanbuoys$sea_temp_c) # }
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