How to plot group delay and phase delay for a continuous time transfer function in MATLAB? -

I have created a continuous time transfer function (S-domain) with the "TF" command. Now I can use the "bombplot" command for plot magnitudes and phase characteristics.

Now I want to plot group delay and phase delays (both function as frequency). I stumbled on "graphical" and "step-by-step" commands but they only work with discrete time filters. What is the equivalent of time constant?

I have not searched the internet with any luck till now: - (

< P> I do not think that is a straightforward task to do this. You can extract step information for several points and then generate (-1 times),