Rounding Function

Apply rounding function to signal

Library

Math Operations

Description

The Rounding Function block applies a rounding function to the input signal to produce the output signal.

You can select one of the following rounding functions from the Function list:

  • floor

    Rounds each element of the input signal to the nearest integer value towards minus infinity.

  • ceil

    Rounds each element of the input signal to the nearest integer towards positive infinity.

  • round

    Rounds each element of the input signal to the nearest integer.

  • fix

    Rounds each element of the input signal to the nearest integer towards zero.

The name of the selected function appears on the block.

The input signal can be a scalar, vector, or matrix signal having real- or complex-valued elements of type double. The output signal has the same dimensions, data type, and numeric type as the input. Each element of the output signal is the result of applying the selected rounding function to the corresponding element of the input signal.

    Tip   Use the Rounding Function block instead of the Fcn block when you want vector or matrix output, because the Fcn block produces only scalar output.

    Also, the Rounding Function block provides two more rounding modes. The Fcn block supports floor and ceil, but does not support round and fix.

Data Type Support

The Rounding Function block accepts and outputs real signals of type double or single.

For more information, see Data Types Supported by Simulink in the Simulink® documentation.

Parameters and Dialog Box

Function

Specify the rounding function.

Sample time (-1 for inherited)

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

Characteristics

Direct Feedthrough

Yes

Sample Time

Specified in the Sample time parameter

Scalar Expansion

N/A

Dimensionalized

Yes

Multidimensionalized

No

Zero-Crossing Detection

No

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