pymatgen.electronic_structure.plotter module¶

class
BSDOSPlotter
(bs_projection='elements', dos_projection='elements', vb_energy_range=4, cb_energy_range=4, fixed_cb_energy=False, egrid_interval=1, font='Times New Roman', axis_fontsize=20, tick_fontsize=15, legend_fontsize=14, bs_legend='best', dos_legend='best', rgb_legend=True, fig_size=(11, 8.5))[source]¶ Bases:
object
A joint, aligned band structure and density of states plot. Contributions from Jan Pohls as well as the online example from Germain SalvatoVallverdu: http://gvallver.perso.univpau.fr/?p=587
Instantiate plotter settings.
 Parameters
bs_projection (str) – “elements” or None
dos_projection (str) – “elements”, “orbitals”, or None
vb_energy_range (float) – energy in eV to show of valence bands
cb_energy_range (float) – energy in eV to show of conduction bands
fixed_cb_energy (bool) – If true, the cb_energy_range will be interpreted as constant (i.e., no gap correction for cb energy)
egrid_interval (float) – interval for grid marks
font (str) – font family
axis_fontsize (float) – font size for axis
tick_fontsize (float) – font size for axis tick labels
legend_fontsize (float) – font size for legends
bs_legend (str) – matplotlib string location for legend or None
dos_legend (str) – matplotlib string location for legend or None
rgb_legend (bool) – (T/F) whether to draw RGB triangle/bar for element proj.
fig_size (tuple) – dimensions of figure size (width, height)

get_plot
(bs, dos=None)[source]¶ Get a matplotlib plot object. :param bs: the bandstructure to plot. Projection
data must exist for projected plots.
 Parameters
dos (Dos) – the Dos to plot. Projection data must exist (i.e., CompleteDos) for projected plots.
 Returns
matplotlib.pyplot object on which you can call commands like show() and savefig()

class
BSPlotter
(bs)[source]¶ Bases:
object
Class to plot or get data to facilitate the plot of band structure objects.
 Parameters
bs – A BandStructureSymmLine object.

bs_plot_data
(zero_to_efermi=True)[source]¶ Get the data nicely formatted for a plot
 Parameters
zero_to_efermi – Automatically subtract off the Fermi energy from the eigenvalues and plot.
 Returns
A dictionary of the following format: ticks: A dict with the ‘distances’ at which there is a kpoint (the x axis) and the labels (None if no label). energy: A dict storing bands for spin up and spin down data [{Spin:[band_index][k_point_index]}] as a list (one element for each branch) of energy for each kpoint. The data is stored by branch to facilitate the plotting. vbm: A list of tuples (distance,energy) marking the vbms. The energies are shifted with respect to the fermi level is the option has been selected. cbm: A list of tuples (distance,energy) marking the cbms. The energies are shifted with respect to the fermi level is the option has been selected. lattice: The reciprocal lattice. zero_energy: This is the energy used as zero for the plot. band_gap:A string indicating the band gap and its nature (empty if it’s a metal). is_metal: True if the band structure is metallic (i.e., there is at least one band crossing the fermi level).
 Return type
dict

get_plot
(zero_to_efermi=True, ylim=None, smooth=False, vbm_cbm_marker=False, smooth_tol=None)[source]¶ Get a matplotlib object for the bandstructure plot. Blue lines are up spin, red lines are down spin.
 Parameters
zero_to_efermi – Automatically subtract off the Fermi energy from the eigenvalues and plot (EEf).
ylim – Specify the yaxis (energy) limits; by default None let the code choose. It is vbm4 and cbm+4 if insulator efermi10 and efermi+10 if metal
smooth – interpolates the bands by a spline cubic
smooth_tol (float) – tolerance for fitting spline to band data. Default is None such that no tolerance will be used.

get_ticks
()[source]¶ Get all ticks and labels for a band structure plot.
 Returns
A dictionary with ‘distance’: a list of distance at which ticks should be set and ‘label’: a list of label for each of those ticks.
 Return type
dict

plot_compare
(other_plotter, legend=True)[source]¶ plot two band structure for comparison. One is in red the other in blue (no difference in spins). The two band structures need to be defined on the same symmetry lines! and the distance between symmetry lines is the one of the band structure used to build the BSPlotter
 Parameters
band structure object defined along the same symmetry lines (another) –
 Returns
a matplotlib object with both band structures

save_plot
(filename, img_format='eps', ylim=None, zero_to_efermi=True, smooth=False)[source]¶ Save matplotlib plot to a file.
 Parameters
filename – Filename to write to.
img_format – Image format to use. Defaults to EPS.
ylim – Specifies the yaxis limits.

show
(zero_to_efermi=True, ylim=None, smooth=False, smooth_tol=None)[source]¶ Show the plot using matplotlib.
 Parameters
zero_to_efermi – Automatically subtract off the Fermi energy from the eigenvalues and plot (EEf).
ylim – Specify the yaxis (energy) limits; by default None let the code choose. It is vbm4 and cbm+4 if insulator efermi10 and efermi+10 if metal
smooth – interpolates the bands by a spline cubic
smooth_tol (float) – tolerance for fitting spline to band data. Default is None such that no tolerance will be used.

class
BSPlotterProjected
(bs)[source]¶ Bases:
pymatgen.electronic_structure.plotter.BSPlotter
Class to plot or get data to facilitate the plot of band structure objects projected along orbitals, elements or sites.
 Parameters
bs – A BandStructureSymmLine object with projections.

get_elt_projected_plots
(zero_to_efermi=True, ylim=None, vbm_cbm_marker=False)[source]¶ Method returning a plot composed of subplots along different elements
 Returns
a pylab object with different subfigures for each projection The blue and red colors are for spin up and spin down The bigger the red or blue dot in the band structure the higher character for the corresponding element and orbital

get_elt_projected_plots_color
(zero_to_efermi=True, elt_ordered=None)[source]¶ returns a pylab plot object with one plot where the band structure line color depends on the character of the band (along different elements). Each element is associated with red, green or blue and the corresponding rgb color depending on the character of the band is used. The method can only deal with binary and ternary compounds
spin up and spin down are differientiated by a ‘‘ and a ‘–’ line
 Parameters
elt_ordered – A list of Element ordered. The first one is red, second green, last blue
 Returns
a pylab object

get_projected_plots_dots
(dictio, zero_to_efermi=True, ylim=None, vbm_cbm_marker=False)[source]¶ Method returning a plot composed of subplots along different elements and orbitals.
 Parameters
dictio – The element and orbitals you want a projection on. The format is {Element:[Orbitals]} for instance {‘Cu’:[‘d’,’s’],’O’:[‘p’]} will give projections for Cu on d and s orbitals and on oxygen p.
 Returns
a pylab object with different subfigures for each projection The blue and red colors are for spin up and spin down. The bigger the red or blue dot in the band structure the higher character for the corresponding element and orbital.

get_projected_plots_dots_patom_pmorb
(dictio, dictpa, sum_atoms=None, sum_morbs=None, zero_to_efermi=True, ylim=None, vbm_cbm_marker=False, selected_branches=None, w_h_size=(12, 8), num_column=None)[source]¶ Method returns a plot composed of subplots for different atoms and orbitals (subshell orbitals such as ‘s’, ‘p’, ‘d’ and ‘f’ defined by azimuthal quantum numbers l = 0, 1, 2 and 3, respectively or individual orbitals like ‘px’, ‘py’ and ‘pz’ defined by magnetic quantum numbers m = 1, 1 and 0, respectively). This is an extension of “get_projected_plots_dots” method.
 Parameters
dictio – The elements and the orbitals you need to project on. The format is {Element:[Orbitals]}, for instance: {‘Cu’:[‘dxy’,’s’,’px’],’O’:[‘px’,’py’,’pz’]} will give projections for Cu on orbitals dxy, s, px and for O on orbitals px, py, pz. If you want to sum over all individual orbitals of subshell orbitals, for example, ‘px’, ‘py’ and ‘pz’ of O, just simply set {‘Cu’:[‘dxy’,’s’,’px’],’O’:[‘p’]} and set sum_morbs (see explanations below) as {‘O’:[p],…}. Otherwise, you will get an error.
dictpa – The elements and their sites (defined by site numbers) you need to project on. The format is {Element: [Site numbers]}, for instance: {‘Cu’:[1,5],’O’:[3,4]} will give projections for Cu on site1 and on site5, O on site3 and on site4 in the cell. Attention: The correct site numbers of atoms are consistent with themselves in the structure computed. Normally, the structure should be totally similar with POSCAR file, however, sometimes VASP can rotate or translate the cell. Thus, it would be safe if using Vasprun class to get the final_structure and as a result, correct index numbers of atoms.
sum_atoms –
Sum projection of the similar atoms together (e.g.: Cu on site1 and Cu on site5). The format is {Element: [Site numbers]}, for instance:
{‘Cu’: [1,5], ‘O’: [3,4]} means summing projections over Cu on site1 and Cu on site5 and O on site3 and on site4. If you do not want to use this functional, just turn it off by setting sum_atoms = None.
sum_morbs – Sum projections of individual orbitals of similar atoms together (e.g.: ‘dxy’ and ‘dxz’). The format is {Element: [individual orbitals]}, for instance: {‘Cu’: [‘dxy’, ‘dxz’], ‘O’: [‘px’, ‘py’]} means summing projections over ‘dxy’ and ‘dxz’ of Cu and ‘px’ and ‘py’ of O. If you do not want to use this functional, just turn it off by setting sum_morbs = None.
selected_branches – The index of symmetry lines you chose for plotting. This can be useful when the number of symmetry lines (in KPOINTS file) are manny while you only want to show for certain ones. The format is [index of line], for instance: [1, 3, 4] means you just need to do projection along lines number 1, 3 and 4 while neglecting lines number 2 and so on. By default, this is None type and all symmetry lines will be plotted.
w_h_size – This variable help you to control the width and height of figure. By default, width = 12 and height = 8 (inches). The width/height ratio is kept the same for subfigures and the size of each depends on how many number of subfigures are plotted.
num_column – This variable help you to manage how the subfigures are arranged in the figure by setting up the number of columns of subfigures. The value should be an int number. For example, num_column = 3 means you want to plot subfigures in 3 columns. By default, num_column = None and subfigures are aligned in 2 columns.
 Returns
A pylab object with different subfigures for different projections. The blue and red colors lines are bands for spin up and spin down. The green and cyan dots are projections for spin up and spin down. The bigger the green or cyan dots in the projected band structures, the higher character for the corresponding elements and orbitals. List of individual orbitals and their numbers (set up by VASP and no special meaning): s = 0; py = 1 pz = 2 px = 3; dxy = 4 dyz = 5 dz2 = 6 dxz = 7 dx2 = 8; f_3 = 9 f_2 = 10 f_1 = 11 f0 = 12 f1 = 13 f2 = 14 f3 = 15

class
BoltztrapPlotter
(bz)[source]¶ Bases:
object
class containing methods to plot the data from Boltztrap.
 Parameters
bz – a BoltztrapAnalyzer object

plot_carriers
(temp=300)[source]¶ Plot the carrier concentration in function of Fermi level
 Parameters
temp – the temperature
 Returns
a matplotlib object

plot_complexity_factor_mu
(temps=[300], output='average', Lambda=0.5)[source]¶ Plot respect to the chemical potential of the Fermi surface complexity factor calculated as explained in Ref. Gibbs, Z. M. et al., Effective mass and fermi surface complexity factor from ab initio band structure calculations. npj Computational Materials 3, 8 (2017).
 Parameters
output – ‘average’ returns the complexity factor calculated using the average of the three diagonal components of the seebeck and conductivity tensors. ‘tensor’ returns the complexity factor respect to the three diagonal components of seebeck and conductivity tensors.
temps – list of temperatures of calculated seebeck and conductivity.
Lambda – fitting parameter used to model the scattering (0.5 means constant relaxation time).
 Returns
a matplotlib object

plot_conductivity_dop
(temps='all', output='average', relaxation_time=1e14)[source]¶ Plot the conductivity in function of doping levels for different temperatures.
 Parameters
temps – the default ‘all’ plots all the temperatures in the analyzer. Specify a list of temperatures if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_conductivity_mu
(temp=600, output='eig', relaxation_time=1e14, xlim=None)[source]¶ Plot the conductivity in function of Fermi level. Semilog plot
 Parameters
temp – the temperature
xlim – a list of min and max fermi energy by default (0, and band gap)
tau – A relaxation time in s. By default none and the plot is by units of relaxation time
 Returns
a matplotlib object

plot_conductivity_temp
(doping='all', output='average', relaxation_time=1e14)[source]¶ Plot the conductivity in function of temperature for different doping levels.
 Parameters
dopings – the default ‘all’ plots all the doping levels in the analyzer. Specify a list of doping levels if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_eff_mass_dop
(temps='all', output='average')[source]¶ Plot the average effective mass in function of doping levels for different temperatures.
 Parameters
temps – the default ‘all’ plots all the temperatures in the analyzer. Specify a list of temperatures if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_eff_mass_temp
(doping='all', output='average')[source]¶ Plot the average effective mass in function of temperature for different doping levels.
 Parameters
dopings – the default ‘all’ plots all the doping levels in the analyzer. Specify a list of doping levels if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
 Returns
a matplotlib object

plot_hall_carriers
(temp=300)[source]¶ Plot the Hall carrier concentration in function of Fermi level
 Parameters
temp – the temperature
 Returns
a matplotlib object

plot_power_factor_dop
(temps='all', output='average', relaxation_time=1e14)[source]¶ Plot the Power Factor in function of doping levels for different temperatures.
 Parameters
temps – the default ‘all’ plots all the temperatures in the analyzer. Specify a list of temperatures if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_power_factor_mu
(temp=600, output='eig', relaxation_time=1e14, xlim=None)[source]¶ Plot the power factor in function of Fermi level. Semilog plot
 Parameters
temp – the temperature
xlim – a list of min and max fermi energy by default (0, and band gap)
tau – A relaxation time in s. By default none and the plot is by units of relaxation time
 Returns
a matplotlib object

plot_power_factor_temp
(doping='all', output='average', relaxation_time=1e14)[source]¶ Plot the Power Factor in function of temperature for different doping levels.
 Parameters
dopings – the default ‘all’ plots all the doping levels in the analyzer. Specify a list of doping levels if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_seebeck_dop
(temps='all', output='average')[source]¶ Plot the Seebeck in function of doping levels for different temperatures.
 Parameters
temps – the default ‘all’ plots all the temperatures in the analyzer. Specify a list of temperatures if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
 Returns
a matplotlib object

plot_seebeck_eff_mass_mu
(temps=[300], output='average', Lambda=0.5)[source]¶ Plot respect to the chemical potential of the Seebeck effective mass calculated as explained in Ref. Gibbs, Z. M. et al., Effective mass and fermi surface complexity factor from ab initio band structure calculations. npj Computational Materials 3, 8 (2017).
 Parameters
output – ‘average’ returns the seebeck effective mass calculated using the average of the three diagonal components of the seebeck tensor. ‘tensor’ returns the seebeck effective mass respect to the three diagonal components of the seebeck tensor.
temps – list of temperatures of calculated seebeck.
Lambda – fitting parameter used to model the scattering (0.5 means constant relaxation time).
 Returns
a matplotlib object

plot_seebeck_mu
(temp=600, output='eig', xlim=None)[source]¶ Plot the seebeck coefficient in function of Fermi level
 Parameters
temp – the temperature
xlim – a list of min and max fermi energy by default (0, and band gap)
 Returns
a matplotlib object

plot_seebeck_temp
(doping='all', output='average')[source]¶ Plot the Seebeck coefficient in function of temperature for different doping levels.
 Parameters
dopings – the default ‘all’ plots all the doping levels in the analyzer. Specify a list of doping levels if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
 Returns
a matplotlib object

plot_zt_dop
(temps='all', output='average', relaxation_time=1e14)[source]¶ Plot the figure of merit zT in function of doping levels for different temperatures.
 Parameters
temps – the default ‘all’ plots all the temperatures in the analyzer. Specify a list of temperatures if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

plot_zt_mu
(temp=600, output='eig', relaxation_time=1e14, xlim=None)[source]¶ Plot the ZT in function of Fermi level.
 Parameters
temp – the temperature
xlim – a list of min and max fermi energy by default (0, and band gap)
tau – A relaxation time in s. By default none and the plot is by units of relaxation time
 Returns
a matplotlib object

plot_zt_temp
(doping='all', output='average', relaxation_time=1e14)[source]¶ Plot the figure of merit zT in function of temperature for different doping levels.
 Parameters
dopings – the default ‘all’ plots all the doping levels in the analyzer. Specify a list of doping levels if you want to plot only some.
output – with ‘average’ you get an average of the three directions with ‘eigs’ you get all the three directions.
relaxation_time – specify a constant relaxation time value
 Returns
a matplotlib object

class
CohpPlotter
(zero_at_efermi=True, are_coops=False)[source]¶ Bases:
object
Class for plotting crystal orbital Hamilton populations (COHPs) or crystal orbital overlap populations (COOPs). It is modeled after the DosPlotter object.
 Args/attributes:
 zero_at_efermi: Whether to shift all populations to have zero
energy at the Fermi level. Defaults to True.
 are_coops: Switch to indicate that these are COOPs, not COHPs.
Defaults to False for COHPs.

add_cohp
(label, cohp)[source]¶ Adds a COHP for plotting.
 Parameters
label – Label for the COHP. Must be unique.
cohp – COHP object.

add_cohp_dict
(cohp_dict, key_sort_func=None)[source]¶ Adds a dictionary of COHPs with an optional sorting function for the keys.
 Parameters
cohp_dict – dict of the form {label: Cohp}
key_sort_func – function used to sort the cohp_dict keys.

get_cohp_dict
()[source]¶ Returns the added COHPs as a jsonserializable dict. Note that if you have specified smearing for the COHP plot, the populations returned will be the smeared and not the original populations.
 Returns
Dict of COHP data of the form {label: {“efermi”: efermi, “energies”: …, “COHP”: {Spin.up: …}, “ICOHP”: …}}.
 Return type
dict

get_plot
(xlim=None, ylim=None, plot_negative=None, integrated=False, invert_axes=True)[source]¶ Get a matplotlib plot showing the COHP.
 Parameters
xlim – Specifies the xaxis limits. Defaults to None for automatic determination.
ylim – Specifies the yaxis limits. Defaults to None for automatic determination.
plot_negative – It is common to plot COHP(E) so that the sign means the same for COOPs and COHPs. Defaults to None for automatic determination: If are_coops is True, this will be set to False, else it will be set to True.
integrated – Switch to plot ICOHPs. Defaults to False.
invert_axes – Put the energies onto the yaxis, which is common in chemistry.
 Returns
A matplotlib object.

save_plot
(filename, img_format='eps', xlim=None, ylim=None)[source]¶ Save matplotlib plot to a file.
 Parameters
filename – File name to write to.
img_format – Image format to use. Defaults to EPS.
xlim – Specifies the xaxis limits. Defaults to None for automatic determination.
ylim – Specifies the yaxis limits. Defaults to None for automatic determination.

class
DosPlotter
(zero_at_efermi=True, stack=False, sigma=None)[source]¶ Bases:
object
Class for plotting DOSs. Note that the interface is extremely flexible given that there are many different ways in which people want to view DOS. The typical usage is:
# Initializes plotter with some optional args. Defaults are usually # fine, plotter = DosPlotter() # Adds a DOS with a label. plotter.add_dos("Total DOS", dos) # Alternatively, you can add a dict of DOSs. This is the typical # form returned by CompleteDos.get_spd/element/others_dos(). plotter.add_dos_dict({"dos1": dos1, "dos2": dos2}) plotter.add_dos_dict(complete_dos.get_spd_dos())
 Parameters
zero_at_efermi – Whether to shift all Dos to have zero energy at the fermi energy. Defaults to True.
stack – Whether to plot the DOS as a stacked area graph
key_sort_func – function used to sort the dos_dict keys.
sigma – A float specifying a standard deviation for Gaussian smearing the DOS for nicer looking plots. Defaults to None for no smearing.

add_dos
(label, dos)[source]¶ Adds a dos for plotting.
 Parameters
label – label for the DOS. Must be unique.
dos – Dos object

add_dos_dict
(dos_dict, key_sort_func=None)[source]¶ Add a dictionary of doses, with an optional sorting function for the keys.
 Parameters
dos_dict – dict of {label: Dos}
key_sort_func – function used to sort the dos_dict keys.

get_dos_dict
()[source]¶ Returns the added doses as a jsonserializable dict. Note that if you have specified smearing for the DOS plot, the densities returned will be the smeared densities, not the original densities.
 Returns
Dict of dos data. Generally of the form {label: {‘energies’:…, ‘densities’: {‘up’:…}, ‘efermi’:efermi}}
 Return type
dict

get_plot
(xlim=None, ylim=None)[source]¶ Get a matplotlib plot showing the DOS.
 Parameters
xlim – Specifies the xaxis limits. Set to None for automatic determination.
ylim – Specifies the yaxis limits.

save_plot
(filename, img_format='eps', xlim=None, ylim=None)[source]¶ Save matplotlib plot to a file.
 Parameters
filename – Filename to write to.
img_format – Image format to use. Defaults to EPS.
xlim – Specifies the xaxis limits. Set to None for automatic determination.
ylim – Specifies the yaxis limits.

fold_point
(p, lattice, coords_are_cartesian=False)[source]¶ Folds a point with coordinates p inside the first Brillouin zone of the lattice.
 Parameters
p – coordinates of one point
lattice – Lattice object used to convert from reciprocal to cartesian coordinates
coords_are_cartesian – Set to True if you are providing coordinates in cartesian coordinates. Defaults to False.
 Returns
The cartesian coordinates folded inside the first Brillouin zone

plot_brillouin_zone
(bz_lattice, lines=None, labels=None, kpoints=None, fold=False, coords_are_cartesian=False, ax=None, **kwargs)[source]¶ Plots a 3D representation of the Brillouin zone of the structure. Can add to the plot paths, labels and kpoints
 Parameters
bz_lattice – Lattice object of the Brillouin zone
lines – list of lists of coordinates. Each list represent a different path
labels – dict containing the label as a key and the coordinates as value.
kpoints – list of coordinates
fold – whether the points should be folded inside the first Brillouin Zone. Defaults to False. Requires lattice if True.
coords_are_cartesian – Set to True if you are providing coordinates in cartesian coordinates. Defaults to False.
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – provided by add_fig_kwargs decorator
 Returns
matplotlib figure
Keyword arguments controlling the display of the figure:
kwargs
Meaning
title
Title of the plot (Default: None).
show
True to show the figure (default: True).
savefig
”abc.png” or “abc.eps” to save the figure to a file.
size_kwargs
Dictionary with options passed to fig.set_size_inches e.g. size_kwargs=dict(w=3, h=4)
tight_layout
True to call fig.tight_layout (default: False)
ax_grid
True (False) to add (remove) grid from all axes in fig. Default: None i.e. fig is left unchanged.
ax_annotate
Add labels to subplots e.g. (a), (b). Default: False

plot_brillouin_zone_from_kpath
(kpath, ax=None, **kwargs)[source]¶  Gives the plot (as a matplotlib object) of the symmetry line path in
the Brillouin Zone.
 Parameters
kpath (HighSymmKpath) – a HighSymmKPath object
ax – matplotlib
Axes
or None if a new figure should be created.**kwargs – provided by add_fig_kwargs decorator
 Returns
matplotlib figure
Keyword arguments controlling the display of the figure:
kwargs
Meaning
title
Title of the plot (Default: None).
show
True to show the figure (default: True).
savefig
”abc.png” or “abc.eps” to save the figure to a file.
size_kwargs
Dictionary with options passed to fig.set_size_inches e.g. size_kwargs=dict(w=3, h=4)
tight_layout
True to call fig.tight_layout (default: False)
ax_grid
True (False) to add (remove) grid from all axes in fig. Default: None i.e. fig is left unchanged.
ax_annotate
Add labels to subplots e.g. (a), (b). Default: False

plot_ellipsoid
(hessian, center, lattice=None, rescale=1.0, ax=None, coords_are_cartesian=False, arrows=False, **kwargs)[source]¶ Plots a 3D ellipsoid rappresenting the Hessian matrix in input. Useful to get a graphical visualization of the effective mass of a band in a single kpoint.
 Parameters
hessian – the Hessian matrix
center – the center of the ellipsoid in reciprocal coords (Default)
lattice – Lattice object of the Brillouin zone
rescale – factor for size scaling of the ellipsoid
ax – matplotlib
Axes
or None if a new figure should be created.coords_are_cartesian – Set to True if you are providing a center in cartesian coordinates. Defaults to False.
kwargs – kwargs passed to the matplotlib function ‘plot_wireframe’. Color defaults to blue, rstride and cstride default to 4, alpha defaults to 0.2.
 Returns
matplotlib figure and matplotlib ax
 Example of use:
fig,ax=plot_wigner_seitz(struct.reciprocal_lattice) plot_ellipsoid(hessian,[0.0,0.0,0.0], struct.reciprocal_lattice,ax=ax)

plot_fermi_surface
(data, structure, cbm, energy_levels=[], multiple_figure=True, mlab_figure=None, kpoints_dict={}, color=(0, 0, 1), transparency_factor=[], labels_scale_factor=0.05, points_scale_factor=0.02, interative=True)[source]¶ Plot the Fermi surface at specific energy value.
 Parameters
data – energy values in a 3D grid from a CUBE file via read_cube_file function, or from a BoltztrapAnalyzer.fermi_surface_data
structure – structure object of the material
energy_levels – list of energy value of the fermi surface. By default 0 eV correspond to the VBM, as in the plot of band structure along symmetry line. Default: max energy value + 0.01 eV
cbm – Boolean value to specify if the considered band is a conduction band or not
multiple_figure – if True a figure for each energy level will be shown. If False all the surfaces will be shown in the same figure. In this las case, tune the transparency factor.
mlab_figure – provide a previous figure to plot a new surface on it.
kpoints_dict – dictionary of kpoints to show in the plot. example: {“K”:[0.5,0.0,0.5]}, where the coords are fractional.
color – tuple (r,g,b) of integers to define the color of the surface.
transparency_factor – list of values in the range [0,1] to tune the opacity of the surfaces.
labels_scale_factor – factor to tune the size of the kpoint labels
points_scale_factor – factor to tune the size of the kpoint points
interative – if True an interactive figure will be shown. If False a non interactive figure will be shown, but it is possible to plot other surfaces on the same figure. To make it interactive, run mlab.show().
 Returns
a Mayavi figure and a mlab module to control the plot.
 Note: Experimental.
Please, double check the surface shown by using some other software and report issues.

plot_labels
(labels, lattice=None, coords_are_cartesian=False, ax=None, **kwargs)[source]¶ Adds labels to a matplotlib Axes
 Parameters
labels – dict containing the label as a key and the coordinates as value.
lattice – Lattice object used to convert from reciprocal to cartesian coordinates
coords_are_cartesian – Set to True if you are providing. coordinates in cartesian coordinates. Defaults to False. Requires lattice if False.
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – kwargs passed to the matplotlib function ‘text’. Color defaults to blue and size to 25.
 Returns
matplotlib figure and matplotlib ax

plot_lattice_vectors
(lattice, ax=None, **kwargs)[source]¶ Adds the basis vectors of the lattice provided to a matplotlib Axes
 Parameters
lattice – Lattice object
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – kwargs passed to the matplotlib function ‘plot’. Color defaults to green and linewidth to 3.
 Returns
matplotlib figure and matplotlib ax

plot_path
(line, lattice=None, coords_are_cartesian=False, ax=None, **kwargs)[source]¶ Adds a line passing through the coordinates listed in ‘line’ to a matplotlib Axes
 Parameters
line – list of coordinates.
lattice – Lattice object used to convert from reciprocal to cartesian coordinates
coords_are_cartesian – Set to True if you are providing coordinates in cartesian coordinates. Defaults to False. Requires lattice if False.
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – kwargs passed to the matplotlib function ‘plot’. Color defaults to red and linewidth to 3.
 Returns
matplotlib figure and matplotlib ax

plot_points
(points, lattice=None, coords_are_cartesian=False, fold=False, ax=None, **kwargs)[source]¶ Adds Points to a matplotlib Axes
 Parameters
points – list of coordinates
lattice – Lattice object used to convert from reciprocal to cartesian coordinates
coords_are_cartesian – Set to True if you are providing coordinates in cartesian coordinates. Defaults to False. Requires lattice if False.
fold – whether the points should be folded inside the first Brillouin Zone. Defaults to False. Requires lattice if True.
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – kwargs passed to the matplotlib function ‘scatter’. Color defaults to blue
 Returns
matplotlib figure and matplotlib ax

plot_wigner_seitz
(lattice, ax=None, **kwargs)[source]¶ Adds the skeleton of the WignerSeitz cell of the lattice to a matplotlib Axes
 Parameters
lattice – Lattice object
ax – matplotlib
Axes
or None if a new figure should be created.kwargs – kwargs passed to the matplotlib function ‘plot’. Color defaults to black and linewidth to 1.
 Returns
matplotlib figure and matplotlib ax