Python

Plotly.Figure_Create.Trisurf

In this article, we will discuss how we can create a trisurf plot using the Plotly figure_factory module.

Function Syntax and Parameters

The function syntax is as shown in the following:

plotly.figure_factory.create_trisurf(x, y, z, simplices, colormap=None, show_colorbar=True, scale=None, color_func=None, title='Trisurf Plot', plot_edges=True, showbackground=True, backgroundcolor='rgb(230, 230, 230)', gridcolor='rgb(255, 255, 255)', zerolinecolor='rgb(255, 255, 255)', edges_color='rgb(50, 50, 50)', height=800, width=800, aspectratio=None)

The required parameters are as follows:

1. x – Defines the data values of x.
2. y – Sets the data values of y.
3. z – Sets the data values of y.
4. show_colorbar – Sets if the colorbar is visible or not.
5. Title – Defines the title for the plot.
6. width/height – Sets the figure width and height in pixels.

Delaunay Plot with Plotly Figure_Factory

The following code uses Plotly figure_factory, NumPy, and SciPy to create a Delaunay plot.

from plotly.figure_factory import create_trisurf
import numpy as np
from scipy.spatial import Delaunay
u = np.linspace(0, 2*np.pi, 20)
v = np.linspace(0, 2*np.pi, 20)
u,v = np.meshgrid(u,v)
u = u.flatten()
v = v.flatten()
x = (3 + (np.cos(v)))*np.cos(u)
y = (3 + (np.cos(v)))*np.sin(u)
z = np.sin(v)
points2D = np.vstack([u,v]).T
tri = Delaunay(points2D)
simplices = tri.simplices
fig = create_trisurf(x=x, y=y, z=z)
fig.show()

Output Figure:

Mobius Strip Trisurf

The following code creates a Mobius strip with Plotly figure_factory.

import plotly.figure_factory as ff
import numpy as np
from scipy.spatial import Delaunay

u = np.linspace(0, 2*np.pi, 24)
v = np.linspace(-1, 1, 8)
u,v = np.meshgrid(u,v)
u = u.flatten()
v = v.flatten()
tp = 1 + 0.5*v*np.cos(u/2.)
x = tp*np.cos(u)
y = tp*np.sin(u)
z = 0.5*v*np.sin(u/2.)
points2D = np.vstack([u,v]).T
tri = Delaunay(points2D)
simplices = tri.simplices
fig = ff.create_trisurf(x=x, y=y, z=z,
colormap="Viridis",
simplices=simplices,
title="Mobius Strip")
fig.show()

Output Figure:

Conclusion

This guide illustrates how to create the trisurf plots with Plotly figure_factory module. Check the docs for more.