Repeating Sequence Interpolated

Output discrete-time sequence and repeat, interpolating between data points

Libraries:
Simulink / Sources

Description

The Repeating Sequence Interpolated block outputs a periodic discrete-time sequence based on the values in Vector of time values and Vector of output values parameters. Between data points, the block uses the method you specify for the Lookup Method parameter to determine the output.

Examples

Fixed-Point S-Functions: Data Type Propagation

How to propagate fixed-point data types in fixed-point S-Functions. It exercises a custom C language S-function written to enforce data types across multiple signals. This operation is available in Simulink® with the "Data Type Propagation" block, which can be used for comparison with this S-function example.

(Fixed-Point Designer)

Ports

Output

expand all

Port_1 — Periodic output signal
scalar

Output signal generated based on the values in the Vector of time values and Vector of output values parameters.

Parameters

expand all

Main

Vector of output values — Vector of output values
`[3 1 4 2 1].'` (default) | vector

Vector of output values that specify the output waveform. Each element corresponds to the time value in the Vector of time values parameter.

Programmatic Use

Block Parameter: OutValues

Type: character vector

Values: vector

Default:

'[3 1 4 2
									1].''

Vector of time values — Vector of time values
`[0 0.1 0.5 0.6 1].'` (default) | vector

Specify the column vector containing time values. The time values must be strictly increasing, and the vector must have the same size as the vector of output values.

Programmatic Use

Block Parameter: TimeValues

Type: character vector

Values: vector

Default:

'[0 0.1 0.5 0.6
									1].''

Lookup Method — Lookup method for output
`Interpolation-Use End Values` (default) | `Use Input Nearest` | `Use Input Below` | `Use Input Above`

Specify the lookup method to determine the output between data points.

Programmatic Use

Block Parameter: LookUpMeth

Type: character vector

Values:

'Interpolation-Use End
										Values'

| 'Use Input Nearest' | 'Use Input Below' |

'Use Input
										Above'

Default: 'Interpolation-Use End Values'

Sample time — Time interval between samples
`0.01` (default) | scalar

Specify the time interval between samples. To inherit the sample time, set this parameter to -1. See Specify Sample Time for more information.

Programmatic Use

Block Parameter: tsamp

Type: character vector

Values: scalar

Default: '0.01'

Signal Attributes

Output minimum — Minimum output value for range checking
`[]` (default) | scalar

Lower value of the output range that the software checks.

The software uses the minimum to perform:

Parameter range checking (see Specify Minimum and Maximum Values for Block Parameters) for some blocks.
Simulation range checking (see Specify Signal Ranges and Enable Simulation Range Checking).
Automatic scaling of fixed-point data types.
Optimization of the code that you generate from the model. This optimization can remove algorithmic code and affect the results of some simulation modes such as SIL or external mode. For more information, see Optimize using the specified minimum and maximum values (Embedded Coder).

Tips

Output minimum does not saturate or clip the actual output signal. Use the Saturation block instead.

Programmatic Use

To set the block parameter value programmatically, use the set_param function.

Parameter:	`OutMin`
Values:	`'[]'` (default) \| scalar in quotes

Output maximum — Maximum output value for range checking
`[]` (default) | scalar

Upper value of the output range that the software checks.

The software uses the maximum value to perform:

Parameter range checking (see Specify Minimum and Maximum Values for Block Parameters) for some blocks.
Simulation range checking (see Specify Signal Ranges and Enable Simulation Range Checking).
Automatic scaling of fixed-point data types.
Optimization of the code that you generate from the model. This optimization can remove algorithmic code and affect the results of some simulation modes such as SIL or external mode. For more information, see Optimize using the specified minimum and maximum values (Embedded Coder).

Tips

Output maximum does not saturate or clip the actual output signal. Use the Saturation block instead.

Programmatic Use

To set the block parameter value programmatically, use the set_param function.

Parameter:	`OutMax`
Values:	`'[]'` (default) \| scalar in quotes

Output data type — Specify the output data type
`double` (default) | `Inherit: Inherit via back propagation` | `single` | `int8` | `int32` | `uint32` | `int64` | `uint64` | `fixdt(1,16,2^0,0)` | `<data type expression>` | ...

Choose the data type for the output. The type can be inherited, specified directly, or expressed as a data type object such as Simulink.NumericType.

Programmatic Use

Block Parameter: OutDataTypeStr

Type: character vector

Values:

'Inherit: Inherit via back
										propagation'

'<data
										type expression>'

Default: 'double'

Lock output data type setting against changes by the fixed-point tools — Prevent fixed-point tools from overriding data types
`off` (default) | `on`

Select to lock the output data type setting of this block against changes by the Fixed-Point Tool and the Fixed-Point Advisor. For more information, see Use Lock Output Data Type Setting (Fixed-Point Designer).

Programmatic Use

Block Parameter: LockScale

Type: character vector

Values: 'off' | 'on'

Default: 'off'

Block Characteristics

Data Types	`Boolean` \| `double` \| `fixed point` \| `integer` \| `single`
Direct Feedthrough	`no`
Multidimensional Signals	`no`
Variable-Size Signals	`no`
Zero-Crossing Detection	`no`

Extended Capabilities

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

Cannot be used inside a triggered subsystem hierarchy.

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

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

Version History

Introduced before R2006a

Repeating Sequence Interpolated

Description

Examples

Fixed-Point S-Functions: Data Type Propagation

Ports

Output

Port_1 — Periodic output signal scalar

Parameters

Main

Vector of output values — Vector of output values [3 1 4 2 1].' (default) | vector

Programmatic Use

Vector of time values — Vector of time values [0 0.1 0.5 0.6 1].' (default) | vector

Programmatic Use

Lookup Method — Lookup method for output Interpolation-Use End Values (default) | Use Input Nearest | Use Input Below | Use Input Above

Programmatic Use

Sample time — Time interval between samples 0.01 (default) | scalar

Programmatic Use

Signal Attributes

Output minimum — Minimum output value for range checking [] (default) | scalar

Tips

Programmatic Use

Output maximum — Maximum output value for range checking [] (default) | scalar

Tips

Programmatic Use

Output data type — Specify the output data type double (default) | Inherit: Inherit via back propagation | single | int8 | int32 | uint32 | int64 | uint64 | fixdt(1,16,2^0,0) | <data type expression> | ...

Programmatic Use

Lock output data type setting against changes by the fixed-point tools — Prevent fixed-point tools from overriding data types off (default) | on

Programmatic Use

Block Characteristics

Extended Capabilities

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

PLC Code Generation Generate Structured Text code using Simulink® PLC Coder™.

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

Version History

See Also

Port_1 — Periodic output signal
scalar

Vector of output values — Vector of output values
`[3 1 4 2 1].'` (default) | vector

Vector of time values — Vector of time values
`[0 0.1 0.5 0.6 1].'` (default) | vector

Lookup Method — Lookup method for output
`Interpolation-Use End Values` (default) | `Use Input Nearest` | `Use Input Below` | `Use Input Above`

Sample time — Time interval between samples
`0.01` (default) | scalar

Output minimum — Minimum output value for range checking
`[]` (default) | scalar

Output maximum — Maximum output value for range checking
`[]` (default) | scalar

Output data type — Specify the output data type
`double` (default) | `Inherit: Inherit via back propagation` | `single` | `int8` | `int32` | `uint32` | `int64` | `uint64` | `fixdt(1,16,2^0,0)` | `<data type expression>` | ...

Lock output data type setting against changes by the fixed-point tools — Prevent fixed-point tools from overriding data types
`off` (default) | `on`

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

PLC Code Generation
Generate Structured Text code using Simulink® PLC Coder™.

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