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 How to Specify the 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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