davrot/pytutorial
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Create README.md

Browse source 
Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
This commit is contained in:
David Rotermund 2023-12-19 15:33:15 +01:00 committed by GitHub
parent 751298c482
commit 6eba6fe625
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 45 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

45
scikit-learn/fast_ica/README.md Normal file
View file

@ -0,0 +1,45 @@
# FastICA
{:.no_toc}
<nav markdown="1" class="toc-class">
* TOC
{:toc}
</nav>
## The goal
Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
## Test data
```python
import numpy as np
import matplotlib.pyplot as plt
rng = np.random.default_rng(1)
a_x = rng.normal(0.0, 1.0, size=(5000))[:, np.newaxis]
a_y = rng.normal(0.0, 1.0, size=(5000))[:, np.newaxis] ** 3
data_a = np.concatenate((a_x, a_y), axis=1)
b_x = rng.normal(0.0, 1.0, size=(5000))[:, np.newaxis] ** 3
b_y = rng.normal(0.0, 1.0, size=(5000))[:, np.newaxis]
data_b = np.concatenate((b_x, b_y), axis=1)
data = np.concatenate((data_a, data_b), axis=0)
angle_x = -0.3
angle_y = 0.3
roation_matrix = np.array(
[[np.cos(angle_x), -np.sin(angle_x)], [np.sin(angle_y), np.cos(angle_y)]]
)
data_r = data @ roation_matrix
plt.plot(data[:, 0], data[:, 1], "b.")
plt.plot(data_r[:, 0], data_r[:, 1], "r.")
plt.show()
```
![image0](image0.png)