matlab exercise help me

The exercise asks me to represent the response to a square wave of amplitude 1 and period 100 of the transfer function: Gs=0.98/(s^2 +6.55*s +0.49);

Do you know how to do it?

[Walter Roberson]

Already answered at https://www.mathworks.com/matlabcentral/answers/1623710-error-using-plot-data-must-be-numeric-datetime-duration-or-an-array-convertible-to-double#comment_1922165