Reshape - Change dimensionality of signal

Library

Math Operations

Description

The Reshape block changes the dimensionality of the input signal to a dimensionality that you specify, using the block's Output dimensionality parameter. For example, you can use the block to change an N-element vector to a 1-by-N or N-by-1 matrix signal, and vice versa.

The Output dimensionality parameter lets you select any of the following output options.

Output DimensionalityDescription

1-D array

Converts a multidimensional array to a vector (1-D array) array signal. The output vector consists of the first column of the input matrix followed by the second column, etc. (This option leaves a vector input unchanged.)

Column vector

Converts a vector, matrix, or multidimensional input signal to a column matrix, i.e., an M-by-1 matrix, where M is the number of elements in the input signal. For matrices, the conversion is done in column-major order. For multidimensional arrays, the conversion is done along the first dimension.

Row vector

Converts a vector, matrix, or multidimensional input signal to a row matrix, i.e., a 1-by-N matrix where N is the number of elements in the input signal. For matrices, the conversion is done in column-major order. For multidimensional arrays, the conversion is done along the first dimension.

Customize

Converts the input signal to an output signal whose dimensions you specify, using the Output dimensions parameter. The value of the Output dimensions parameter can be a one- or multi-element vector. A value of [N] outputs a vector of size N. A value of [M N] outputs an M-by-N matrix. The number of elements of the input signal must match the number of elements specified by the Output dimensions parameter. For multidimensional arrays, the conversion is done along the first dimension.

Data Type Support

The Reshape block accepts and outputs signals of any data type supported by Simulink software, including fixed-point and enumerated data types.

For a discussion on the data types supported by Simulink software, see Data Types Supported by Simulink in the Simulink documentation.

Parameters and Dialog Box

Output dimensionality

The dimensionality of the output signal.

Output dimensions

Specifies a custom output dimensionality. This option is enabled only if you select Customize as the value of the Output dimensionality parameter.

Characteristics

Direct Feedthrough

Yes

Sample Time

Inherited from driving block

Scalar Expansion

N/A

Dimensionalized

Yes

Multidimensionalized

Yes

Zero Crossing

No

  


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