[MATLAB基础] Matlab中的逻辑运算"&&"与"&"，"||"与"|"的区别 - MATLAB爱好者论坛-LabFans.com

drosophilia · 2009-05-28, 15:10

Matlab中的逻辑运算"&&"与"&"，"||"与"|"的区别是怎么样的？

TTT_IOU · 2009-05-29, 23:43

& Element-wise Logical AND.
A & B is a matrix whose elements are logical 1 (TRUE) where both A
and B have non-zero elements, and logical 0 (FALSE) where either has
a zero element. A and B must have the same dimensions (or one can
be a scalar).

&& Short-Circuit Logical AND.
A && B is a scalar value that is the logical AND of scalar A and B.
This is a "short-circuit" operation in that MATLAB evaluates B only
if the result is not fully determined by A. For example, if A equals
0, then the entire expression evaluates to logical 0 (FALSE), regard-
less of the value of B. Under these circumstances, there is no need
to evaluate B because the result is already known.

| Element-wise Logical OR.
A | B is a matrix whose elements are logical 1 (TRUE) where either
A or B has a non-zero element, and logical 0 (FALSE) where both have
zero elements. A and B must have the same dimensions (or one can
be a scalar).

|| Short-Circuit Logical OR.
A || B is a scalar value that is the logical OR of scalar A and B.
This is a "short-circuit" operation in that MATLAB evaluates B only
if the result is not fully determined by A. For example, if A equals
1, then the entire expression evaluates to logical 1 (TRUE), regard-
less of the value of B. Under these circumstances, there is no need
to evaluate B because the result is already known.
望有帮助！！！

2009-05-28, 15:10	#1
drosophilia 普通会员注册日期: 2008-05-29 年龄: 46 帖子: 35 声望力: 17	Matlab中的逻辑运算"&&"与"&"，"\|\|"与"\|"的区别 Matlab中的逻辑运算"&&"与"&"，"\|\|"与"\|"的区别是怎么样的？

2009-05-29, 23:43	#2
TTT_IOU 普通会员注册日期: 2009-02-22 帖子: 91 声望力: 18	回复: Matlab中的逻辑运算"&&"与"&"，"\|\|"与"\|"的区别 & Element-wise Logical AND. A & B is a matrix whose elements are logical 1 (TRUE) where both A and B have non-zero elements, and logical 0 (FALSE) where either has a zero element. A and B must have the same dimensions (or one can be a scalar). && Short-Circuit Logical AND. A && B is a scalar value that is the logical AND of scalar A and B. This is a "short-circuit" operation in that MATLAB evaluates B only if the result is not fully determined by A. For example, if A equals 0, then the entire expression evaluates to logical 0 (FALSE), regard- less of the value of B. Under these circumstances, there is no need to evaluate B because the result is already known. \| Element-wise Logical OR. A \| B is a matrix whose elements are logical 1 (TRUE) where either A or B has a non-zero element, and logical 0 (FALSE) where both have zero elements. A and B must have the same dimensions (or one can be a scalar). \|\| Short-Circuit Logical OR. A \|\| B is a scalar value that is the logical OR of scalar A and B. This is a "short-circuit" operation in that MATLAB evaluates B only if the result is not fully determined by A. For example, if A equals 1, then the entire expression evaluates to logical 1 (TRUE), regard- less of the value of B. Under these circumstances, there is no need to evaluate B because the result is already known. 望有帮助！！！