inf

Create array of allinf值

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Syntax

X = Inf

x = inf（n)

x = inf（SZ1，...，SZN)

x = inf（sz）

x = inf（___,typename)

x = inf（___，'喜欢'，p)

Description

X = Infreturns the scalar representation of positive infinity. Operations returninfwhen their result is too large to represent as a floating point number, such as1/0或者log(0)。

For double-precision,inf代表大于Realmax。对于单精制，inf代表大于REALMAX（'单'）。

example

x = inf（n)返回n-经过-nmatrix ofinf值。

example

x = inf（SZ1，...，SZN)返回sz1-经过-。。。-经过-szN大批ofinf值, whereSZ1，...，SZNindicate the size of each dimension. For example,INF（3,4）returns a 3-by-4 matrix.

example

x = inf（sz)返回一系列inf值, where the size vectorszdefinessize(X)。For example,inf([3 4])returns a 3-by-4 matrix.

example

x = inf（___,打字)返回一系列inf数据类型的值打字，这可以是'single'或者'double'。

example

x = inf（___，'喜欢'，p)返回一系列inf值of the same data type, sparsity, and complexity (real or complex) asp。You can specify打字或者'like'但不是两者。

Examples

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矩阵`inf`Values

打开实时脚本

创建一个3 x-3的矩阵inf值。

x = inf（3)

X =3×3infinfinfinfinfinfinfinfinf

3-D Array of`inf`Values

打开实时脚本

创建一个2 x-3 x-4的阵列inf值并显示其大小。

x = inf（2,3,4); size(X)

ans =1×32 3 4

Clone Size from Existing Array

打开实时脚本

Create an array ofinf值that is the same size as an existing array.

A = [1 4; 2 5; 3 6]; sz = size(A); X = Inf(sz)

X =3×2infinfinfinfinfinf

将前两行代码组合到单行中是一种常见模式。

x = inf（size(A));

指定数据类型`inf`Values

打开实时脚本

Create a 1-by-3 vector ofinf值whose elements are of typesingle。

x = inf（1,3,'single')

X =1x3 single row vectorinfinfinf

您也可以指定the output type based on the type of another variable. Create a variablepof typesingle。Then, create a vector ofinf值with the same size and type asp。

p =单个（[1 2 3]）;x = inf（size（p），'like',p)

X =1x3 single row vectorinfinfinf

Input Arguments

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`n`—Size of square matrix
整数

方形矩阵的大小，指定为整数。

Ifn是0，然后Xis an empty matrix.
Ifnis negative, then it is treated as 0.

`SZ1，...，SZN`—Size of each dimension in a list
整数s

Size of each dimension in a list, specified as separate integer arguments.

If the size of any dimension is 0, thenXis an empty array.
If the size of any dimension is negative, then it is treated as 0.
Beyond the second dimension,infignores trailing dimensions of length 1. For example,inf(3,1,1)creates a 3-by-1 vector ofinf值。

`sz`—Size of each dimension in a vector
row vector of integers

Size of each dimension in a vector, specified as a row vector of integers.

If the size of any dimension is 0, thenXis an empty array.
If the size of any dimension is negative, then it is treated as 0.
Beyond the second dimension,infignores trailing dimensions of length 1. For example,INF（[3 1]）creates a 3-by-1 vector ofinf值。

`打字`—数据类型
`'double'`(default) |`single'`

数据类型来创建、specified as'double'或者'single'。

`p`—Prototype of array
大批

数组的原型要创建，指定为数组。

Data Types:double|single
Complex Number Support:Yes

Extended Capabilities

C/C++ Code Generation
使用MATLAB®CODER™生成C和C ++代码。

Usage notes and limitations:

Dimensions must be real, nonnegative, integers.

Thread-Based Environment
Run code in the background using MATLAB®`背景池`或者accelerate code with Parallel Computing Toolbox™`ThreadPool`。

This function fully supports thread-based environments. For more information, seeRun MATLAB Functions in Thread-Based Environment。

GPU Arrays
使用并行计算工具箱™在图形处理单元（GPU）上运行加速代码。

Usage notes and limitations:

You can specify打字as'gpuarray'。如果指定打字as'gpuarray', the default underlying type of the array isdouble。
To create a GPU array with underlying type数据类型, specify the underlying type as an additional argument before打字。For example,x = inf（3,datatype,'gpuArray')创建一个3 x-3的GPU阵列inf值with underlying type数据类型。
You can specify the underlying type数据类型as one of these options:
- 'double'
- 'single'
您也可以指定数字变量p作为一个gpuArray。
如果指定p作为一个gpuArray，返回数组的基础类型与p。

For more information, seeRun MATLAB Functions on a GPU(Parallel Computing Toolbox)。

Distributed Arrays
Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

Usage notes and limitations:

You can specify打字as“编码”或者'distributed'。如果指定打字as“编码”或者'distributed', the default underlying type of the returned array isdouble。
创建具有基础类型的分布式或编码阵列数据类型, specify the underlying type as an additional argument before打字。For example,x = inf（3,datatype,'distributed')creates a 3-by-3 distributed array of allinf值with underlying type数据类型。
You can specify the underlying type数据类型as one of these options:
- 'double'
- 'single'
您也可以指定p作为一个codistributed或者distributed大批。
如果指定p作为一个codistributed或者distributed大批，返回数组的基础类型与p。
额外codistributedsyntaxes, seeINF（编码）(Parallel Computing Toolbox)。

For more information, see运行具有分布式数组的MATLAB功能(Parallel Computing Toolbox)。

Version History

在R2006a之前引入

inf

Syntax

Description

Examples

矩阵infValues

3-D Array ofinfValues

Clone Size from Existing Array

指定数据类型infValues

Input Arguments

n—Size of square matrix整数

SZ1，...，SZN—Size of each dimension in a list整数s

sz—Size of each dimension in a vectorrow vector of integers

打字—数据类型'double'(default) |single'

p—Prototype of array大批

Extended Capabilities

C/C++ Code Generation使用MATLAB®CODER™生成C和C ++代码。

Thread-Based EnvironmentRun code in the background using MATLAB®背景池或者accelerate code with Parallel Computing Toolbox™ThreadPool。

GPU Arrays使用并行计算工具箱™在图形处理单元（GPU）上运行加速代码。

Distributed ArraysPartition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.

Version History

See Also

矩阵`inf`Values

3-D Array of`inf`Values

指定数据类型`inf`Values

`n`—Size of square matrix
整数

`SZ1，...，SZN`—Size of each dimension in a list
整数s

`sz`—Size of each dimension in a vector
row vector of integers

`打字`—数据类型
`'double'`(default) |`single'`

`p`—Prototype of array
大批

C/C++ Code Generation
使用MATLAB®CODER™生成C和C ++代码。

Thread-Based Environment
Run code in the background using MATLAB®`背景池`或者accelerate code with Parallel Computing Toolbox™`ThreadPool`。

GPU Arrays
使用并行计算工具箱™在图形处理单元（GPU）上运行加速代码。

Distributed Arrays
Partition large arrays across the combined memory of your cluster using Parallel Computing Toolbox™.