how to plot phase graph for given optimised coefficient of second order

b = [0.9999 0.9837 -0.2876];
a = [ 0.9896 -0.2869];

the coefficients are given as above

Answer 1

[Star Strider]

You did not provide a sampling frequency, so I assume this is a continuous-time transfer function.

One option is to use the Signal Processing Toolbox freqs function. (Use the freqz function with a sampling frequency for a discrete system. See the documentation on the various functions for details.)

The Code_ —

b = [0.9999 0.9837 -0.2876];
a = [ 0.9896 -0.2869];

figure(1)
freqs(b, a, 2^14)