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Math Function

Perform a mathematical function.

Library

Math

Description

The Math Function block performs numerous common mathematical functions.

You can select one of these functions from the Function list: exp, log, 10u, log10, square, sqrt, pow, reciprocal, hypot, rem, and mod. The block output is the result of the function operating on the input or inputs.

The name of the function appears on the block icon. Simulink automatically draws the appropriate number of input ports.

Use the Math Function block instead of the Fcn block when you want vectorized output because the Fcn block can produce only scalar output.

Data Type Support

A Math Function block accepts complex or real-valued signals or signal vectors of type double.The output signal type is real or complex, depending on the setting of the Output signal type parameter.

Parameters and Dialog Box

Function
The mathematical function.
Output signal type
The dialog allows you to select the output signal type of the Math Function block as real, complex, or auto.


 Input
 Output Signal Type
Function
 Signal
 Auto
 Real
 Complex
Exp, log, log^, log10, square, sqrt, pow, reciprocal, conjugate
 real
complex
 real
complex
 real
error
 complex
complex
magnitude squared
 real
complex
 real
real
 real
real
 complex
complex
hypot, rem, mod
 real
complex
 real
error
 real
error
 complex
error

Characteristics

Direct Feedthrough
 Yes
Sample Time
 Inherited from driving block
Scalar Expansion
 Of the input when the function requires two inputs
Vectorized
 Yes
Zero Crossing
 No


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