Well, I found out part of the confusion:
The modern versions of MatLab renamed their function from 'step' to
'stepz' .
Stepz(num,den) provides a calculation of the time-response to a step
function based on the system state equation defined by the num and den
coefficients.
So, is there some R function (maybe inside some of the TS packages)
which do similar Laplace-transform-related calculations?
thanks
Carl
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