You can use impulse and step commands with output arguments to
get the numerical impulse- and step-response vectors as a function
of time, respectively.
To get the numerical response values:
Compute the FIR model by using impulseest,
as described in Estimate Impulse-Response Models at the Command Line.
Apply the following syntax on the resulting model:
% To compute impulse-response data [y,t,~,ysd] = impulse(model) % To compute step-response data [y,t,~,ysd] = step(model)
where y is the response data, t is
the time vector, and ysd is the standard deviations
of the response.