Returns the sign of a number.
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Syntax |
Description |
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out = sign(data); |
If data is real: sign = 0 for data=0 sign = 1 for data>0 sign =-1 for data<0 If data is complex: sign = 0 for data=0+0i sign = data/abs(data) for data different from zero |
Example
Example output from sign function.
# real numbers data = [2; 0; -2]; ?sign(data); # complex numbers data = [2+2i; 0+0i; -2+0i]; ?sign(data); ?abs( sign(data) ); result: 1 0 -1 result: 0.707107+0.707107i 0+0i -1+0i result: 1 0 1
See Also