Corrected the calculation of the hessian matrix for the sparse output. If limits=[5,10] with N=256 the output matrix is 5x(3*256), rembering and saving according to selected limits is in the responsibitly of the programmer.
Corrected the calculation of the hessian matrix for the sparse output.
If limits=[5,10] with N=256 the output matrix is 5x(3*256), rembering and saving according to selected limits is in the responsibitly of the programmer.

libAtoms/matscipy,libAtoms/matscipy,libAtoms/matscipy,libAtoms/matscipy