Grpdelay function with plotting for a transfer function

I am trying to find the grpdelay of a transfer function and plot it but am not sure how to use the function in MATLAB.

The transfer function I have is

H = tf([0.25 -0.1045 1],[1 -0.1045 0.25],0.1;

and this is what im trying to do.

Answer 1

[Harsh Parikh]

Hi,

'tf()' function has the following prototype: (https://www.mathworks.com/help/control/ref/tf.html)

sys_obj = tf(<Numerator_coefficients>,<Denominator_Coefficients>,Sample_time)

Thus, your first vector ([0.25 -0.1045 1]) is a vector of coefficients for the Numerator part and the second vector ([1 -0.1045 0.25]) will be a vector of coefficients for the denominator part.

'grpdelay()' function has the following prototype: (https://www.mathworks.com/help/signal/ref/grpdelay.html)

[Group_delay, angular_freq] = grpdelay(<Numerator_coefficients>, <Denominator_Coefficients>)

After having all this information, you can use the 'grpdelay()' as follows:

[gd,w] = grpdelay(First_vector, second_vector)

I got the following graph for the given input:

[Jackson]

Ok I see now thank you