Permute Matlab

Reorder matrix rows or columns

1. Permute Matlab Example
2. Permute Matlab Random
3. Matlab Permute 4d Array
4. Matlab Permute Function

Permute Matlab Example

此 MATLAB 函数 按照向量 dimorder 指定的顺序重新排列数组的维度。例如，permute(A,2 1) 交换矩阵 A 的行和列维度。. How to permute binary numbers to a specific. Learn more about permutation. Rearrange the dimensions of a multidimensional array. B = permute(A,order) Description. B = permute(A,order) rearranges the dimensions of A so that they are in the order specified by the vector order. B has the same values of A but the order of the subscripts needed to access any particular element is rearranged as specified.

• Library:

• DSP System Toolbox / Math Functions / Matrices and Linear Algebra / Matrix Operations

Description

The Permute Matrix block reorders the rows or columns of an M-by-N input matrix A as specified by indexing input P.

Ports

Input

Input matrix, specified as a scalar, vector, or matrix.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated

Index matrix, specified as a scalar or vector.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | enumerated

Output

Output signal, specified as a vector or matrix.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated

Parameters

Method of constructing the output matrix by permuting rows or columns of the input.

When the Permute parameter is set to:

• Rows –– The block uses the rows of A to create a matrix that has the same column dimension. Input P is a length-L vector whose elements determine where each row from A must be placed in the L-by-N output matrix.

  For row permutation, the block treats the length-M unoriented vector input at the port A as an M-by-1 matrix.

• Columns –– The block uses the columns of A to create a matrix that has the same row dimension. Input P is a length-L vector whose elements determine where each column from A must be placed in the M-by-L output matrix.

  For column permutation, the block treats the length-N unoriented vector input at port A as a 1-by-N matrix.

When set to One-based, a value of 1 in the permutation vector P refers to the first row or column of the input matrix A. When set to Zero-based, a value of 0 in P refers to the first row or column of A.

Response to an invalid index value. When an index value in input P references a nonexistent row or column of matrix A, the block reacts as specified in this parameter. These options are available:

• Clip index –– Clip the index to the nearest valid value (1 or M for row permutation and 1 or N for column permutation) and do not issue an alert. Example: For a 3-by-7 input matrix, a column index of 9 is clipped to 7 and a row index of -2 is clipped to 1.

• Clip and warn –– Display a warning message in the MATLAB^® Command Window and clip the index as described in the preceding bullet.

• Generate error –– Display an error dialog box and terminate the simulation.

Tunable: Yes

Option to display an error dialog box and terminate the simulation when the length of the permutation vector P is not equal to the number of rows or columns of the input matrix A.

You can choose to open an error dialog box and terminate the simulation by setting this parameter to on.

Model Examples

Simulink^® model example that shows how to permute a matrix by rows or columns.

The application envisioned for this example is automatic lane tracking on a road. We will show how to fit a polynomial to noisy data representing the lane boundary of the road ahead of a vehicle.

Block Characteristics

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Generated code relies on memcpy or memset functions (string.h) under certain conditions.

Fixed-Point Conversion
Design and simulate fixed-point systems using Fixed-Point Designer™.

See Also

Blocks

• Submatrix | Variable Selector

Functions

Rearrange dimensions of multidimensional array dimensions

Description

The Permute Dimensions block reorders the elements of the input signal by permuting its dimensions. You specify the permutation to be applied to the input signal using the Order parameter.

For example, to transpose a 3-by-5 input signal, specify the permutation vector [2 1] for the Order parameter. When you do, the block reorders the elements of the input signal and outputs a 3-by-5 matrix.

You can use an array of buses as an input signal to a Permute Dimensions block. For details about defining and using an array of buses, see Combine Buses into an Array of Buses.

Input

Permute Matlab Random

This port accepts scalar, vector, matrix, and N-dimensional signals of any data type that Simulink^® Viscosity 1 8 45. supports, including fixed-point, enumerated, and nonvirtual bus data types.

Data Types: half | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Output

The block outputs the permutation of the input signal, according to the value of the Order parameter. The output has the same data type as the input.

Data Types: half | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Parameters

Specify the permutation order to apply to the dimensions of the input signal. The value of this parameter must be an N-element vector where N is the number of dimensions of the input signal. The elements of the permutation vector must be a rearrangement of the values from 1 to N.

For example, the permutation vector [2 1] applied to a 5-by-3 input signal results in a 3-by-5 output signal, in other words, the transpose of the input signal.

Programmatic Use

Model Examples

Use the Permute Dimensions block to permute the first and third dimensions of a 3-by-4-by-5 input array.

Block Characteristics

Extended Capabilities

See Also

Math Function | permute

Matlab Permute 4d Array

Matlab Permute Function