Section: Inspection Functions
isempty
function returns a boolean that indicates
if the argument variable is empty or not. The general
syntax for its use is
y = isempty(x).
isempty
function
--> a = [] a = <double> - size: [0 0] [] --> isempty(a) ans = <logical> - size: [1 1] 1 --> b = 1:3 b = <int32> - size: [1 3] Columns 1 to 3 1 2 3 --> isempty(b) ans = <logical> - size: [1 1] 0
Note that if the variable is not defined, isempty
does not return true.
--> clear x --> isempty(x) Error: Undefined function or variable x