str(lstab)
Formal class 'fDISTFIT' [package "fBasics"] with 6 slots
..@ call : language .qStableFit(x = x, doplot = doplot, title = title, description = description)
..@ model : chr "Stable Distribution"
..@ data :'data.frame': 231635 obs. of 1 variable:
.. ..$ x: num [1:231635] 2658 2789 3184 3033 2658 ...
..@ fit :List of 1
.. ..$ estimate: Named num [1:4] 0.875 0.126 299.711 2917.415
.. .. ..- attr(*, "names")= chr [1:4] "alpha" "beta" "gamma" "delta"
..@ title : chr "Stable Parameter Estimation"
..@ description: chr "Thu Apr 17 16:07:36 2014 by user: "
So for example:
> lstab@fit
$estimate
alpha beta gamma delta
0.8750 0.1260 299.7113 2917.4148