R help - Feb 2009 - equivalent function to MatLab 'step' ?

I have to admit I don't fully understand how MatLab's step() function 
works, but I'm learning that part.   Can someone point me to 
equivalent&related functions in R?

thanks
Carl

Hi

r-help-bounces at r-project.org napsal dne 20.02.2009 02:22:35:
> I have to admit I don't fully understand how MatLab's step()
function
> works, but I'm learning that part.   Can someone point me to 
> equivalent&related functions in R?
Maybe ?step. Howewer without knowing what Matlab's step function does it 
is rather precarious answer.

Regards
Petr

> 
> thanks
> Carl
> 
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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