Width

Output width of input vector

• 

Libraries:
Simulink / Signal Attributes

Description

The Width block generates as output the width of its input vector.

You can use an array of buses as an input signal to a Width block. For details about defining and using an array of buses, see Group Nonvirtual Buses in Arrays of Buses.

Examples

Bounded Variable-Size Signal Basic Operations

Generate bounded variable-size signals and illustrates some of the operations using those signals. In this example, you generate variable-size signals using the Selector block and the Switch block. The signals are used in math operations, bus creation, bus selection, matrix concatenation and to implement a discrete filter equation.

• Open Model

Variable-Size Signal Length Adaptation

Model showing how to change the length of a signal over time.

• Open Model

Ports

Input

Port_1 — Input signal

scalar | vector | matrix | N-D array

Input signal specified as a scalar, vector, matrix, or N-D array.

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

Output

Port_1 — Width of input signal

scalar

Output is the width of the input signal, specified as a scalar.

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

Parameters

Output data type mode — Output data type mode

Choose intrinsic data type (default) | Inherit via back propagation | All ports same datatype

Specify the output data type to be the same as the input, or inherit the data type by back propagation. You can also choose to specify a built-in data type from the drop-down list in the Output data type parameter.

Programmatic Use

Block Parameter: OutputDataTypeScalingMode

Type: character vector

Values: 'Choose intrinsic data type' | 'Inherit via back propagation' | 'All ports same datatype'

Default: 'Choose intrinsic data type'

Output data type — Output data type

double (default) | single | int8 | uint8 | int16 | uint16 | int32 | uint32

This parameter is visible when you select Choose intrinsic data type for Output data type mode. Select a built-in data type from the drop-down list.

Programmatic Use

Block Parameter: DataType

Type: character vector

Values: 'double' | 'single' | 'int8' | 'uint8' | 'int16' | 'uint16' | 'int32' | 'uint32'

Default: 'double'

Always use constant sample time — Always use constant sample time

off (default) | on

To always use a constant sample time, select this parameter. To inherit the sample time, clear this check box.

Programmatic Use

Block Parameter: AlwaysUseConstantSampleTime

Type: character vector

Values: 'on' | 'off'

Default: 'on'

Block Characteristics

Data Types	Boolean | bus | double | enumerated | fixed point | half | integer | single | string
Direct Feedthrough	yes
Multidimensional Signals	yes
Variable-Size Signals	yes
Zero-Crossing Detection	no

Extended Capabilities

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

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

Version History

Introduced before R2006a

R2024a: Width Block Supports Symbolic Dimensions

The Width block has these changes:

• Support for symbolic dimensions.

• New parameter, Always use constant sample time.