A Tri-Surface Plot is a type of surface plot, created by triangulation of compact surfaces of finite number of triangles which cover the whole surface in a manner that each and every point on the surface is in triangle. The intersection of any two triangles results in void or a common edge or vertex. This type of plot is created where the evenly sampled grids are restrictive and inconvenient to plot. Generally Tri-Surface plots are created by calling ax.plot_trisurf() function of matplotlib library. Some of the attributes of the function are listed below:
Attribute | Parameter |
---|---|
X, Y, Z | dataset as 1D array to be plotted |
colors | color of the surface patches |
cmap | color map to set the color of surface patches |
norm | parameter to normalize map values of colors |
vmin | minimum value of map |
vamx | maximum value of map |
shade | attribute to shade the facecolors |
Example 1: Let’s create a basic Tri-Surface plot using the ax.plot_trisurf() function.
# Import libraries from mpl_toolkits import mplot3d
import numpy as np
import matplotlib.pyplot as plt
# Creating dataset z = np.linspace( 0 , 50000 , 100 )
x = np.sin(z)
y = np.cos(z)
# Creating figure fig = plt.figure(figsize = ( 14 , 9 ))
ax = plt.axes(projection = '3d' )
# Creating plot ax.plot_trisurf(x, y, z, linewidth = 0.2 ,
antialiased = True );
# show plot plt.show() |
Output :
Example 2 : For better understanding Let’s take another example.
# Import libraries from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
# Creating radii and angles r = np.linspace( 0.125 , 1.0 , 100 )
a = np.linspace( 0 , 2 * np.pi,
100 ,
endpoint = False )
# Repeating all angles for every radius a = np.repeat(a[..., np.newaxis], 100 , axis = 1 )
# Creating dataset x = np.append( 0 , (r * np.cos(a)))
y = np.append( 0 , (r * np.sin(a)))
z = (np.sin(x * * 4 ) + np.cos(y * * 4 ))
# Creating figure fig = plt.figure(figsize = ( 16 , 9 ))
ax = plt.axes(projection = '3d' )
# Creating color map my_cmap = plt.get_cmap( 'hot' )
# Creating plot trisurf = ax.plot_trisurf(x, y, z,
cmap = my_cmap,
linewidth = 0.2 ,
antialiased = True ,
edgecolor = 'grey' )
fig.colorbar(trisurf, ax = ax, shrink = 0.5 , aspect = 5 )
ax.set_title( 'Tri-Surface plot' )
# Adding labels ax.set_xlabel( 'X-axis' , fontweight = 'bold' )
ax.set_ylabel( 'Y-axis' , fontweight = 'bold' )
ax.set_zlabel( 'Z-axis' , fontweight = 'bold' )
# show plot plt.show() |
Output: