Skip to content

Instantly share code, notes, and snippets.

@alyssaq
Last active August 29, 2015 14:12
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save alyssaq/90d5f116250c443cd928 to your computer and use it in GitHub Desktop.
Save alyssaq/90d5f116250c443cd928 to your computer and use it in GitHub Desktop.
Identity matrix linear transformations
import matplotlib.pyplot as plt
ax = plt.axes()
ax.arrow(0, 0, 1, 0, head_width=0.05, head_length=0.1, fc='k', ec='k', zorder=20)
ax.arrow(0, 0, 0, 1, head_width=0.05, head_length=0.1, fc='k', ec='k', zorder=20)
ax.arrow(0, 0, np.cos(np.deg2rad(-30)), np.sin(np.deg2rad(-30)), head_width=0.05, head_length=0.1, fc='r', ec='r', zorder=10)
ax.arrow(0, 0, -np.sin(np.deg2rad(-30)), np.cos(np.deg2rad(-30)), head_width=0.05, head_length=0.1, fc='r', ec='r', zorder=10)
ax.spines['left'].set_position('zero')
ax.spines['right'].set_color('none')
ax.spines['bottom'].set_position('zero')
ax.spines['top'].set_color('none')
ax.xaxis.set_ticks_position('bottom')
ax.yaxis.set_ticks_position('left')
ax.set_aspect('equal')
plt.ylim([-0.7,1.2])
plt.xlim([-0.1,1.2])
plt.show()
import matplotlib.pyplot as plt
ax = plt.axes()
ax.arrow(0, 0, 1, 0, head_width=0.05, head_length=0.1, fc='k', ec='k', zorder=20)
ax.arrow(0, 0, 0, 1, head_width=0.05, head_length=0.1, fc='k', ec='k', zorder=20)
ax.arrow(0, 0, 2, 0, head_width=0.05, head_length=0.1, fc='r', ec='r', zorder=10)
ax.arrow(0, 0, 0, 2, head_width=0.05, head_length=0.1, fc='r', ec='r', zorder=10)
ax.spines['left'].set_position('zero')
ax.spines['right'].set_color('none')
ax.spines['bottom'].set_position('zero')
ax.spines['top'].set_color('none')
ax.xaxis.set_ticks_position('bottom')
ax.yaxis.set_ticks_position('left')
ax.set_aspect('equal')
plt.ylim([-0.1,2.2])
plt.xlim([-0.1,2.2])
plt.show()
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment