<< shiftdim

Elementary functions

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sign

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Find the sign function of a number.

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Syntax

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R = sign(M)

Input argument

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M

a variable

Output argument

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R

result of sign.

Description

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sign find the sign function of a number.

-1 if the corresponding element of M is less than 0.

0 if the corresponding element of M equals 0.

1 if the corresponding element of M is greater than 0.

If input argument is a complex number, sign computes M ./ abs(M).

Example

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V = [-1 0 15 NaN Inf];
sign(V)

See also

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conj, abs.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET