**Gradient_file1_analogy.py**
![Gradient_file1_analogy.py](Gradient_file1_analogy.gif) **Gradient_file2_input-output.py**
![Gradient_file2_input-output.py](Gradient_file2_input-output.gif) **Gradient_file3_input-output2.py**
![Gradient_file3_input-output2.py](Gradient_file3_input-output2.gif) **Gradient_file4_why-partials.py**
![Gradient_file4_why-partials.py](Gradient_file4_why-partials.gif) **Gradient_file5_contour-lines-and-map.ipynb**
![Gradient_file5_contour-lines-and-map.ipynb](Gradient_file5_contour-lines-and-map.png) **Gradient_file6_surf-contour-plot.ipynb**
![Gradient_file6_surf-contour-plot.ipynb](Gradient_file6_surf-contour-plot.png) **Gradient_file7_missiles.py**
![Gradient_file7_missiles.py](Gradient_file7_missiles.gif) **Gradient_file8_fluid-flow.py**
![Gradient_file8_fluid-flow.py](Gradient_file8_fluid-flow.gif)