MATLAB tf

### From ControlTheoryPro.com

## 1 Introduction to MATLAB's *tf* command

Transfer functions are easily to created in MATLAB using the *tf* command. (The *tf* command requires the.) This command accepts two vectors - one for the numerator and one for the denominator.

## 2 Basic Usage for MATLAB's *tf* command

The basic usage of MATLAB's *tf* command is

>> sys = tf(num, den);

where:

*num*is a vector representing the coefficients of the numerator and*den*is a vector representing the coefficients of the denominator.

For example, a transfer function like this

becomes

>> num = [1 2]; >> den = [1 3 10];

Notice that MATLAB determines the order from the number of elements in the vectors. If the numerator had been then

>> num = [1 0 2];

would be the correct vector.

## 3 MATLAB Related Books