# MATLAB: How to convert filter coefficients to a system object

filterfirsystem

Hi, I have a question about filter system object. I design a filter using firpm, which gives me a set of coefficients. Now I want to plot the Hankel singular value of this filter. However the "hsvd" function only takes system object as input. So my question is, how to convert FIR filter coefficients into system object? Or, is there a way to design filter easily using firpm which returns a system object?
My codes below here.
f = [0 0.3 0.4 0.6 0.7 1];                   %a passband of 0.4-0.6a = [0 0.0 1.0 1.0 0.0 0];b = firpm(39,f,a,[30,1,30]);hsv = hsvd(b)

f = [0 0.3 0.4 0.6 0.7 1];                   %a passband of 0.4-0.6a = [0 0.0 1.0 1.0 0.0 0];b = firpm(39,f,a,[30,1,30]);s = tf('s');                                % Define Continuous Systemsysobj = tf(b, 1);hsv = hsvd(sysobj);
Error using DynamicSystem/hsvd (line 62)The "hsvd" command cannot be used for models with more zeros than poles.