Return 1 for elements of x that are NA (missing) values and zero otherwise. For example, isna ([13, Inf, NA, NaN]) [ 0, 0, 1, 0 ]
Return 1 for elements of x that are NA (missing) values and zero otherwise. For example,
isna ([13, Inf, NA, NaN]) [ 0, 0, 1, 0 ]