Persistence graphical tools user manual¶
Definition¶
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Numpy |
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These graphical tools comes on top of persistence results and allows the user to build easily barcode and persistence diagram. |
| Persistence graphical tools user manual | Persistence graphical tools reference manual |
Show persistence as a barcode¶
This function can display the persistence result as a barcode:
import gudhi
perseus_file = gudhi.__root_source_dir__ + '/data/bitmap/3d_torus.txt'
periodic_cc = gudhi.PeriodicCubicalComplex(perseus_file=perseus_file)
diag = periodic_cc.persistence()
print("diag = ", diag)
plt = gudhi.plot_persistence_barcode(diag)
plt.show()
Show persistence as a diagram¶
This function can display the persistence result as a diagram:
import gudhi
# rips_on_tore3D_1307.pers obtained from write_persistence_diagram method
persistence_file=gudhi.__root_source_dir__ + \
'/data/persistence_diagram/rips_on_tore3D_1307.pers'
plt = gudhi.plot_persistence_diagram(persistence_file=persistence_file,
legend=True)
plt.show()
If you want more information on a specific dimension, for instance:
import gudhi
persistence_file=gudhi.__root_source_dir__ + \
'/data/persistence_diagram/rips_on_tore3D_1307.pers'
diag = \
gudhi.read_persistence_intervals_grouped_by_dimension(persistence_file=\
persistence_file)
dim = 1
# Display all points with some transparency
plt = gudhi.plot_persistence_diagram([(dim,interval) for interval in diag[dim]],
max_plots=0, alpha=0.1)
plt.show()
