fft of step functions
I want to do fast fourier transform (using matlab) of the following functions
a) step function.i.e
f(t) = 0.0 if t<0
f(t) = F0 if t>=0
b) step function with exponential decay parameter
g(t) = 0.0 if t<0
g(t) = F0*exp(-at) if t>=0
Here the time domain is from (-infinity to +infinity)
The obtained results would be compared with continuous fourier transform results.
Pl. could u help to do the above.