Parameters for extracting potential

calculation.potential.whatPotential

key word	:	calculation.potential.whatPotential
possible values	:	Hartree, Coulomb, Vh, Vdh;
		Effective, Veff;
		ExchangeCorrelation, Vxc;
		NeutralAtom, Vna.
default value	:	Hartree
description	:	If Hartree, Coulomb, Vh, Vdh, the delta_Hartree
		potential will be provided.
		If Effective, Veff, the effective potential, i.e.
		summation of delta_Hartree and exchange-correlation
		potential, will be provided.
		If ExchangeCorrelation, Vxc, the exchange-correlation
		potential will be provided.
		If NeutralAtom, Vna, the summation of all neutral
		atomic potential will be provided.
		Note that only the calculated results are provided, and
		no actual calculation is to be performed.
an example	:	calculation.potential.whatPotential = Hartree
		Effective, Veff,
		ExchangeCorrelation, Vxc,
		NeutralAtom, Vna

calculation.potential.gridIndex

key word	:	calculation.potential.gridIndex
possible values	:	1\(\times\)3 cell array of 1\(\times\)n integer array
default value	:	that for all central cell grids
description	:	this parameter is used to determine a subset of the
		central cell grids, potential value on the subset will
		be provided. For example, when gridIndex = {[3,4], [5],
		[6,7,8]}, the potential values at 2*1*3
		= 6 points of (3,5,6), (3,5,7), (3,5,8), (4,5,6),
		(4,5,7), (4,5,8) will be provided.
an example	:	calculation.potential.gridIndex = {10:20, 15, 10:20}

calculation.potential.plot

key word	:	calculation.potential.plot
possible values	:	true or false
default value	:	false
description	:	If true, a plot will be given after the calculation.
an example	:	calculation.potential.plot = true