isnan

Check for Not a Number entries.

Syntax

• tf = isnan(M)

Input argument

• M - a variable

Output argument

• tf - logical: result of 'isnan'.

Description

isnan returns a logical array which is true where elements of M are "Not a Number" values.

Example

isnan(pi)
isnan(NaN)
isnan(int32(3))
X = sparse([1 2 NaN 3 0 NaN 0 4]);
R = isnan(X)

See also

isinf.

History

Author

Allan CORNET