Can I specify C matrix with tf2ss?

I want to get

C = [a 0 0] (a is constant number)

system.But tf2ss provide me

C = [-6684 2.673e+08 -2.674e+12]

system.

Please tell me how to specify C matrix.

Answer 1

[Walter Roberson]

You cannot specify the C matrix in a tf2ss() call. It always calculates the C matrix based upon the numerator and denominator. Look around line 80 of tf2ss

[Ryoto Suzuki]

Thank you for your answer!