logical-not

Purpose

Performs logical negation.

Format

y = not a

Parameters

param a:

Input value.

type a:

scalar, vector, or matrix

Returns

return y:

1 where a is zero, 0 where a is non-zero.

rtype y:

same dimensions as input

Examples

x = 0;
y = not x;

y =    1.0000000

x = { 0, 1, 0, 5, -3 };
y = not x;

y =    1.0000000
       0.0000000
       1.0000000
       0.0000000
       0.0000000

In Conditional Logic

found = 0;
if not found;
    print "Not found";
endif;

Not found

Remarks

• Any non-zero value is considered true; zero is false.

• not operates element-by-element on matrices.

• Equivalent to a .== 0.

See also

Operators logical-and, logical-or