<< ismatrix

Elementary functions

isrow >>

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isnan

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Check for Not a Number entries.

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Syntax

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tf = isnan(M)

Input argument

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M

a variable

Output argument

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tf

logical: result of 'isnan'.

Description

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

Example

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

See also

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isinf.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET