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bsxfun

Apply element-wise operation to two arrays with implicit expansion enabled

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Syntax

c = bsxfun（娱乐，a，b）

描述

example

C =bsxfun(乐趣,a，b)应用函数句柄指定的元素二进制操作乐趣to arraysA和B。

例子

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Subtract the column mean from the corresponding column elements of a matrixA。然后通过标准偏差正常化。

A = [1 2 10; 3 4 20; 9 6 15]; C = bsxfun(@minus, A, mean(A)); D = bsxfun(@rdivide, C, std(A))
d =3×3-0.8006 -1.0000 -1.0000 -0.3203 0 1.0000 1.1209 1.0000 0

在Matlab® R2016b and later, you can directly use operators instead ofbsxfun，由于操作员独立支持具有兼容大小的阵列的隐式扩展。万博1manbetx

（a-平均（a））./ std（a）
ans =3×3-0.8006 -1.0000 -1.0000 -0.3203 0 1.0000 1.1209 1.0000 0
打开实时脚本

Compare the elements in a column vector and a row vector. The result is a matrix containing the comparison of each combination of elements from the vectors. An equivalent way to execute this operation is witha> b。

A = [8; 17; 20; 24]
A =4×18 17 20 24
b = [0 10 21]
b =1×30 10 21
C =bsxfun(@gt,A,B)
C =4x3逻辑阵列1 0 0 1 1 0 1 1 0 1 1 1 1
打开实时脚本

Create a function handle that represents the function f ( a , b ) = a - e b 。

fun = @（a，b）a -exp（b）;

利用bsxfun将功能应用于向量a和b。这bsxfun乐趣ction expands the vectors into matrices of the same size, which is an efficient way to evaluate乐趣对于输入的许多组合。

a = 1：7;b = pi*[0 1/4 1/3 1/2 2/3 3/4 1]。c = bsxfun（娱乐，a，b）
C =7×70 1.0000 2.0000 3.0000 4.0000 5.0000 6.0000 -1.1933 -0.1933 0.8067 1.8067 2.8067 3.8067 4.8067 -1.8497 -0.8497 0.1503 1.1503 2.1503 3.1503 4.1503 -3.8105 -2.8105 -1.8105 -0.8105 0.1895 1.1895 2.1895 -7.1205 -6.1205 -5.1205 -4.1205 -3.1205 -2.1205 -1.1205-9.5507 -8.5507 -7.5507 -6.5507 -5.5507 -4.5507 -3.5507 -2.1407 -22.1407 -21.1407 -20.1407 -19.1407 -1407 -18.1407 -17.17.14.14.1407 -16.1407 -16.1407-16.1407-14.14.1407-14.1407 -16.1407

Input Arguments

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Binary function to apply, specified as a function handle.乐趣必须是表单的二进制（两输入）元素函数C =乐趣(A,B)that accepts arraysA和Bwith compatible sizes. For more information, see兼容阵列大小用于基本操作。乐趣must support scalar expansion, such that ifA或者B是标量Cis the result of applying the scalar to every element in the other input array.

在Matlab®R2016b and later, the built-in binary functions listed in this table independently support implicit expansion. With these functions, you can call the function or operator directly instead of usingbsxfun。例如，您可以替换C =bsxfun(@plus,A,B)witha+b。

功能 象征 描述
加

+

加
minus

-

Minus
时代

。*

数组乘以
rdivide

./

Right array divide
ldivide

。\

左阵列划分
力量

。^

Array power
eq

==

平等的
NE

〜=

不相等
gt

>

Greater than
ge

> =

Greater than or equal to
上尉

<

Less than
le

<=

Less than or equal to
和

&

元素逻辑和
或者

|

Element-wise logical OR
xor

N/A

Logical exclusive OR
bitand

N/A

位和
bitor

N/A

Bit-wise OR
Bitxor

N/A

位XOR
最大限度

N/A

Binary maximum
min

N/A

二进制最小值
mod

N/A

Modulus after division
rem

N/A

Remainder after division
atan2

N/A

四季度逆切线；导致弧度
atan2d

N/A

四季度逆切线；result in degrees
hypot

N/A

Square root of sum of squares

例子：C =bsxfun(@plus,[1 2],[2; 3])

Data Types:function_handle

Input arrays, specified as scalars, vectors, matrices, or multidimensional arrays. InputsA和Bmust have compatible sizes. For more information, see兼容阵列大小用于基本操作。Whenever a dimension ofA或者Bis singleton (equal to one),bsxfunvirtually replicates the array along that dimension to match the other array. In the case where a dimension ofA或者Bis singleton, and the corresponding dimension in the other array is zero,bsxfunvirtually diminishes the singleton dimension to zero.

Data Types:single|双倍的|uint8|UINT16|uint32|uint64|int8|INT16|INT32|INT64|char|logical
Complex Number Support:Yes

提示

  • It is recommended that you replace most uses ofbsxfunwith direct calls to the functions and operators that support implicit expansion. Compared to usingbsxfun, implicit expansion offers faster speed of execution, better memory usage, and improved readability of code. For more information, see兼容阵列大小用于基本操作。

Extended Capabilities

Version History

Introduced in R2007a

See Also

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