How can I make an uncertain state space system discrete?

I tried to use the function c2d, but Matlab says that it cannot be applied to uss structures. What should I do??

I tried defining a Ts when defining the state space system, but i get very odd results from there (even for certain cases). by odd, I mean that the bode obtained with c2d is very close to the continuous one, but the one obtained by defining Ts when defining the state space system is far from the original one. Reasons for that?

thanks

[Siddharth Jawahar]

Hi GB,

Can you illustate by means of posting your reproduction steps and plots? It would be easier if we see what you are seeing.

Thanks!

Sid