added neural network weights visualization

Author: gavinkhung

_toc.yml

@@ -17,4 +17,5 @@ parts:
     - file: chapter3/logistic_regression
   - caption: Chapter 4. Neural Networks
     chapters:
-    - file: chapter4/neural_network
+    - file: chapter4/neural_network
+    - file: chapter4/neural_network_weights

download_notebooks.sh

@@ -13,3 +13,5 @@ curl -o chapter3/perceptron.ipynb https://raw.githubusercontent.com/gavinkhung/p
 curl -o chapter4/neural_network.ipynb https://raw.githubusercontent.com/gavinkhung/neural-network/refs/heads/main/neural_network.ipynb
 curl -o chapter4/plot/nn.svg https://raw.githubusercontent.com/gavinkhung/neural-network/refs/heads/main/plot/nn.svg
 curl -o chapter4/plot/architecture/nn-1.png https://raw.githubusercontent.com/gavinkhung/neural-network/refs/heads/main/plot/architecture/nn-1.png
+
+curl -o chapter4/neural_network_weights.ipynb https://raw.githubusercontent.com/gavinkhung/neural-network/refs/heads/main/neural_network_weights.ipynb

index.md

@@ -15,6 +15,36 @@ Extending on linear models, multiple layers will be stacked and new activation f
 :class-container: text-center
 :gutter: 3
 
+:::{grid-item-card}
+:link: /machine-learning-visualized/chapter4/neural_network_weights
+:class-header: bg-light
+
+**Neural Network Loss Landscape**
+^^^
+
+```{image} https://raw.githubusercontent.com/gavinkhung/neural-network/refs/heads/main/neural_network_weights_loss_landscape.gif
+:width: 100%
+```
+
++++
+Jupyter Notebook {fas}`arrow-right`
+:::
+
+:::{grid-item-card}
+:link: /machine-learning-visualized/chapter4/neural_network_weights
+:class-header: bg-light
+
+**Neural Network Transformations**
+^^^
+
+```{image} https://raw.githubusercontent.com/gavinkhung/neural-network/main/neural_network_weights.gif
+:width: 100%
+```
+
++++
+Jupyter Notebook {fas}`arrow-right`
+:::
+
 :::{grid-item-card}
 :link: /machine-learning-visualized/chapter4/neural_network
 :class-header: bg-light