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#!/usr/bin/env python
"""Matplotlib 3D plotting example
Demonstrates plotting with matplotlib.
"""
import sys
from sample import sample
from sympy import Symbol
from sympy.external import import_module
def mplot3d(f, var1, var2, *, show=True):
"""
Plot a 3d function using matplotlib/Tk.
"""
import warnings
warnings.filterwarnings("ignore", r"Could not match \S")
p = import_module('pylab')
# Try newer version first
p3 = import_module('mpl_toolkits.mplot3d',
import_kwargs={'fromlist': ['something']}) or import_module('matplotlib.axes3d')
if not p or not p3:
sys.exit("Matplotlib is required to use mplot3d.")
x, y, z = sample(f, var1, var2)
fig = p.figure()
ax = p3.Axes3D(fig)
# ax.plot_surface(x, y, z, rstride=2, cstride=2)
ax.plot_wireframe(x, y, z)
ax.set_xlabel('X')
ax.set_ylabel('Y')
ax.set_zlabel('Z')
if show:
p.show()
def main():
x = Symbol('x')
y = Symbol('y')
mplot3d(x**2 - y**2, (x, -10.0, 10.0, 20), (y, -10.0, 10.0, 20))
# mplot3d(x**2+y**2, (x, -10.0, 10.0, 20), (y, -10.0, 10.0, 20))
# mplot3d(sin(x)+sin(y), (x, -3.14, 3.14, 10), (y, -3.14, 3.14, 10))
if __name__ == "__main__":
main()
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