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C++ API

Mapping Function: isna (x)

Return a logical array which is true where the elements of x are NA (missing) values and false where they are not.

For example:

isna ([13, Inf, NA, NaN])
    ⇒ [ 0, 0, 1, 0 ]

See also: isnan, isinf, isfinite.

Package: octave