|MATLAB Function Reference|
Convert numeric values to logical
K = logical(A)
returns an array that can be used for logical indexing or logical tests.
B is a logical array, returns the values of
A at the indices where the real part of
B is nonzero.
B must be the same size as
Most arithmetic operations remove the logicalness from an array. For example, adding zero to a logical array removes its logical characteristic.
A = +A is the easiest way to convert a logical array,
A, to a numeric double array.
Logical arrays are also created by the relational operators (
~, etc.) and functions like
A = [1 2 3; 4 5 6; 7 8 9], the statement
B = logical(eye(3)) returns a logical array
which can be used in logical indexing that returns
A's diagonal elements:
However, attempting to index into
A using the numeric array
eye(3) results in:
islogical, logical operators