missing

📝Syntax

m = missing()

📤Output Arguments

Parameter	Description
m	a missing value for use in arrays and tables

📄Description

missing returns a special value to represent missing (undefined data). When assigned into an array or table, the missing value is automatically converted into the standard missing value used by the array’s data type.

An indexed assignment such as A(k) = missing or A(:) = missing keeps the class of A: missing becomes NaN in a double or single array, <missing> in a string array, NaN in a duration array and NaT in a datetime array. Arrays of the other classes (char, logical, integer, cell) have no missing value and the assignment raises an error.

Concatenation follows the same rules: [missing missing] is a 1-by-2 missing array, [missing 1] is [NaN 1], [missing []] is NaN, [missing "a"] is a string array, and concatenating missing with a char, logical, integer, cell, struct or function handle value raises an error.

💡Examples

A = missing()
A = double([1, 2, missing()])
B = string(["foo", missing()])
C = struct("Name", "Alice", "Age", missing())
S = strings(1, 3);
S(2:3) = missing
X = [1 2 3];
X(:) = missing
M = [missing missing]