all_na: (Internal) Find Rows or Columns with Only NAs Over Array...
In grahamstewart12/tidyflux:

Description Usage Arguments See Also Examples

all_na returns a logical vector or array or list indicating whether there are only NA values in selected margins and therefore e.g. statistics like max or min do not produce useful results.

1	all_na(x, margin)

`x`	An array, including a matrix.
`margin`	A vector giving the subscripts which the function will be applied over. E.g., for a matrix `1` indicates rows, `2` indicates columns, `c(1, 2)` indicates rows and columns. Where `x` has named dimnames, it can be a character vector selecting dimension names.

NA for general information about NAs and apply for apply description.

xx <- matrix(1:20, nrow = 4)
xx[2, ] <- NA
all_na(xx, 2)  # All columns have at least one non-missing value
all_na(xx, 1)  # Second row has all values missing
## Skip the all_na row in apply()
apply(xx[!all_na(xx, 1), ], 1, max, na.rm = TRUE)