Plotting

The SystemElements object implements several plotting methods for retrieving standard plotting results. Every plotting method has got the same parameters. The plotter is based on a Matplotlib backend and it is possible to get the figure and do modifications of your own. The x and y coordinates of the model should all be positive value for the plotter to work properly.

Note that plotting capabilities do require that anaStruct be installed with the “plot” sub-module (e.g. pip install anastruct[plot] )

Structure

SystemElements.show_structure(verbosity=0, scale=1.0, offset=(0, 0), figsize=None, show=True, supports=True, values_only=False, annotations=False)[source]

Plot the structure.

Parameters

  • factor – Influence the plotting scale.

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

  • values_only (bool) – Return the values that would be plotted as tuple containing two arrays: (x, y)

  • annotations (bool) – if True, structure annotations are plotted. It includes section name. Note: only works when verbosity is equal to 0.

Bending moments

SystemElements.show_bending_moment(factor=None, verbosity=0, scale=1, offset=(0, 0), figsize=None, show=True, values_only=False)[source]

Plot the bending moment.

Parameters

  • factor (Optional[float]) – Influence the plotting scale.

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

  • values_only (bool) – Return the values that would be plotted as tuple containing two arrays: (x, y)

Axial forces

SystemElements.show_axial_force(factor=None, verbosity=0, scale=1, offset=(0, 0), figsize=None, show=True, values_only=False)[source]

Plot the axial force.

Parameters

  • factor (Optional[float]) – Influence the plotting scale.

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

  • values_only (bool) – Return the values that would be plotted as tuple containing two arrays: (x, y)

Shear forces

SystemElements.show_shear_force(factor=None, verbosity=0, scale=1, offset=(0, 0), figsize=None, show=True, values_only=False)[source]

Plot the shear force.

Parameters

  • factor (Optional[float]) – Influence the plotting scale.

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

  • values_only (bool) – Return the values that would be plotted as tuple containing two arrays: (x, y)

Reaction forces

SystemElements.show_reaction_force(verbosity=0, scale=1, offset=(0, 0), figsize=None, show=True)[source]

Plot the reaction force.

Parameters

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

Displacements

SystemElements.show_displacement(factor=None, verbosity=0, scale=1, offset=(0, 0), figsize=None, show=True, linear=False, values_only=False)[source]

Plot the displacement.

Parameters

  • factor (Optional[float]) – Influence the plotting scale.

  • verbosity (int) – 0: All information, 1: Suppress information.

  • scale (float) – Scale of the plot.

  • offset (Tuple[float, float]) – Offset the plots location on the figure.

  • figsize (Optional[Tuple[float, float]]) – Change the figure size.

  • show (bool) – Plot the result or return a figure.

  • linear (bool) – Don’t evaluate the displacement values in between the elements

  • values_only (bool) – Return the values that would be plotted as tuple containing two arrays: (x, y)

Save figure

When the show parameter is set to False a Matplotlib figure is returned and the figure can be saved with proper titles.

from anastruct import SystemElements
import numpy as np
import matplotlib.pyplot as plt

x = np.arange(0, 10)
y = np.sin(x)

ss = SystemElements()
ss.add_element_grid(x, y)
ss.add_support_hinged(node_id=[1, -1])

fig = ss.show_structure(show=False)
plt.title('A sine wave')
plt.savefig('my-figure.png')
_images/my-figure.png