sknano.core.atoms.BasisAtoms

class sknano.core.atoms.BasisAtoms(atoms=None, casttype=True, **kwargs)

An Atoms sub-class for crystal structure basis atoms.

Sub-class of Atoms class, and a container class for lists of BasisAtom instances.

Parameters:

atoms : {None, sequence, BasisAtoms}, optional

if not None, then a list of BasisAtom instance objects or an existing BasisAtoms instance object.

Attributes

CM	Alias for center_of_mass.
M	Total mass of Atoms.
Natoms	Number of atoms in Atoms.
bounds	Bounds of Atoms.
center_of_mass	Center-of-Mass coordinates of Atoms.
centroid	Centroid of Atoms.
com	Alias for center_of_mass.
coords	Alias for Atoms.r.
dr	ndarray of Atom.dr displacement Vectors
elements	ndarray of Atom.elements in Atoms.
fmtstr
inertia_tensor	Inertia tensor.
lattice
masses	ndarray of Atom.masss in Atoms.
pbc
r	ndarray of Atom.r position Vectors
rs	ndarray of Atom.r position Vectors
symbols	ndarray of Atom.symbols in Atoms.
x	ndarray of Atoms $x$ coordinates.
xs	ndarray of Atoms $x$ coordinates.
y	ndarray of Atoms $y$ coordinates.
ys	ndarray of Atoms $y$ coordinates.
z	ndarray of Atoms $z$ coordinates.
zs	ndarray of Atoms $z$ coordinates.

Methods

append(atom)
center_CM([axis])	Alias for center_center_of_mass.
center_center_of_mass([axis])	Center atoms on center-of-mass coordinates.
center_centroid()	Center centroid on origin.
center_com([axis])	Alias for center_center_of_mass.
clear()
clip_bounds(region[, center_before_clipping])	Remove atoms outside the given region.
copy()
count(item)
extend(other)
filter(condition[, invert])	Filter Atoms by condition.
filtered(condition[, invert])	Return new list of Atoms filtered by condition.
get_atoms([asarray])	Return list of Atoms.
get_coords([asdict])	Return atom coords.
getatomattr(attr)	Get ndarray of atom attributes attr.
index(item, *args)
insert(i, item)
mapatomattr([from_attr, to_attr, attrmap])	Set/update atom attribute from another atom attribute with dict.
pop([i])
remove(item)
reverse()
rezero([epsilon])	Set values with absolute value less than epsilon to zero.
rezero_coords([epsilon])	Alias for Atoms.rezero_xyz.
rezero_xyz([epsilon])	Rezero position vector components with absolute value less than epsilon.
rotate(**kwargs)	Rotate Atom vectors.
set_pbc([xperiodic, yperiodic, zperiodic])
sort([key, reverse])
todict()
translate(t[, fix_anchor_points])	Translate Atom vectors by Vector t.
unset_pbc()
wrap_coords([pbc])