1. PYTHON
Graphs
Prof. Muhammad Saeed

2. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
(Simple Line Graphs)
Python Dept. Of Comp. Sc. & IT, FUUAST

3. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
import matplotlib.pyplot as plt
from numpy import arange, sin, exp, pi
Line Graph(Colors ):
x= arange(-12*pi, 12*pi, 0.1)
y=exp(-0.05*x)*sin(x)
plt.plot(x, y, ‘ob’)
plt.plot(x, y, ‘-r’)
plt.plot(x, y, ‘-sm’)
plt.plot(x,y, color=‘#ff0000’)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

4. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
Color, Marker & Line Style
Python Dept. Of Comp. Sc. & IT, FUUAST

5. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
import matplotlib.pyplot as plt
from numpy import arange, sin, exp, pi
Line Graph(Title and Labels ):
x= arange(-12*pi, 12*pi, 0.1)
y=exp(-0.05*x)*sin(x)
plt.plot(x, y, ‘b’)
plt.title(‘Graph Damped Oscillator’)
plt.xlabel(‘Angle’)
plt.ylabel(‘Oscillations’)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

6. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
Graph With Marker and Line Styles:
x= arange(-12*pi, 12*pi, 0.1)
y=exp(-0.05*x)*sin(x)
plt.plot(x, y, alpha = 0.5, color = ‘#FF7F00’,
label = ’Line Label’, linestyle = ‘-.’, linewidth = 3,
marker = ‘o’, markeredgecolor = ‘#000000’,
markeredgewidth = 2, markerfacecolor = ‘#FF7F00’,
markersize=10)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

7. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
import matplotlib.pyplot as plt
from numpy import arange, sin, cos, pi
Multiple Graphs in One Figure:
x= arange(-12*pi, 12*pi, 0.1)
y1=sin(x)
y2=cos(x)
y3=sin(x)/x
plt.plot(x, y1, x, y2, x, y3)
plt.legend(‘Sine’,’Cosine’,’Sine/Angle’).draggable(True)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

8. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
import matplotlib.pyplot as plt
from numpy import arange, sin, cos, pi
Multiple Graphs in One Figure:
x= arange(-12*pi, 12*pi, 0.1)
y1=sin(x)
y2=cos(x)
y3=sin(x)/x
plt.plot(x, y1)
plt.plot(x,y2)
plt.plot(x,y3)
plt.legend(‘Sine’,’Cosine’,’Sine/Angle’).draggable(True)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

9. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 2D
Multiple Subplots in a Window:
import matplotlib.pyplot as plt
Import numpy as np
fig, ax=plt.subplots(2,2, sharex='all' ) #, sharey=‘all’)
x= np.linspace(-12*pi, 12*pi, 600)
y1=np.sin(x) ;
y2=np.tan(x);
y3=np.sin(x)/x
y4=np.exp(-0.05*x)*np.sin(x)
ax=np.ravel(ax)
ax[0].plot(x,y1,'r')
ax[1].plot(x,y2,'g')
ax[2].plot(x,y3,'b')
ax[3].plot(x,y4,'m')
Python Dept. Of Comp. Sc. & IT, FUUAST

10. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 3D
(Wireframe and surface)
Python Dept. Of Comp. Sc. & IT, FUUAST

11. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 3D
Curves:
import matplotlib.pyplot as plt
Import numpy as np
from mpl_toolkits.mplot3d import Axes3D
x = linspace(-8*pi,8*pi,400)
y = x*sin(x)
x = 2*cos(x)
z = x*y
fig = plt.figure()
ax=fig.gca(projection='3d')
ax.plot(x,y,z)
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

12. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 3D
Wireframe:
import matplotlib.pyplot as plt
Import numpy as np
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
x=np.linspace(-7,7,200)
y=np.linspace(-7,7,200)
xx,yy=np.meshgrid(x,y)
zz=np.sin(np.sqrt(xx**2+yy**2))/np.sqrt(xx**2+yy**2)
ax.plot_wireframe(xx, yy, zz, rstride=5, cstride=5)
Python Dept. Of Comp. Sc. & IT, FUUAST

13. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 3D
Surface:
import matplotlib.pyplot as plt
Import numpy as np
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
x=np.linspace(-7,7,200)
y=np.linspace(-7,7,200)
xx,yy=np.meshgrid(x,y)
zz=np.sin(np.sqrt(xx**2+yy**2))/np.sqrt(xx**2+yy**2)
ax.plot_surface(xx, yy, zz, rstride=5, cstride=5)
Python Dept. Of Comp. Sc. & IT, FUUAST

14. Python Dept. Of Comp. Sc. & IT, FUUAST
Graph 3D
Surface:
import matplotlib.pyplot as plt
Import numpy as np
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
u = np.linspace(0, 2 * np.pi, 100)
v = np.linspace(0, np.pi, 100)
x = 10 * np.outer(np.cos(u), np.sin(v))
y = 10 * np.outer(np.sin(u), np.sin(v))
z = 10 * np.outer(np.ones(np.size(u)), np.cos(v))
ax.plot_surface(x, y, z, rstride=4, cstride=4, color='b',cmap='jet')
ax.axis('square')
plt.show()
Python Dept. Of Comp. Sc. & IT, FUUAST

15. Python Dept. Of Comp. Sc. & IT, FUUAST
END
Python Dept. Of Comp. Sc. & IT, FUUAST