Class Mode

Initialize mode object as part of an NMA model.

:arg model: a normal mode analysis instance :type model: :class:`.NMA`, :class:`.GNM`, or :class:`.PCA` :arg index: index of the mode :type index: int

Overrides: object.__init__

repr(x)

Overrides: object.__repr__

(inherited documentation)

str(x)

Overrides: object.__str__

(inherited documentation)

Return **True** if mode instance is from a 3-dimensional model.

Overrides: VectorBase.is3d

Return number of atoms.

Overrides: VectorBase.numAtoms

Return the index of the mode. Note that mode indices are zero-based.

Return a copy of the normal mode array (eigenvector).

Overrides: VectorBase.getArray

Return normal mode eigenvalue. For :class:`.PCA` and :class:`.EDA` models built using coordinate data in Å, unit of eigenvalues is |A2|. For :class:`.ANM` and :class:`.GNM`, on the other hand, eigenvalues are in arbitrary or relative units but they correlate with stiffness of the motion along associated eigenvector.

Return variance along the mode. For :class:`.PCA` and :class:`.EDA` models built using coordinate data in Å, unit of variance is |A2|. For :class:`.ANM` and :class:`.GNM`, on the other hand, variance is the inverse of the eigenvalue, so it has arbitrary or relative units.