If you want to experiment with PyTorch

If you want to experiment with one neuron

Highcharts.js for 3D Plotting

<script src='https://code.highcharts.com/highcharts.js'></script>
<script src='https://code.highcharts.com/highcharts-3d.js'></script>
<script src='https://code.highcharts.com/modules/accessibility.js'></script>
was added in the page head.

HTML & JavaScript & SageMathCell

D3.js for Plotting with Random Coefficients

<script src='https://d3js.org/d3.v4.min.js'></script> was added in the page head.

Exercises in R and Python in the Same Cell

Plotting Exercises in R and Python

Magic Functions for Querying