There are files, referred to in the problems of Computational Methods for Physics, that contain data — those are at the top below. Then there are Mathematica notebooks that are associated with each chapter. These notebooks have the code that generated all the examples and figures in the book, and are meant to provide both a point of entry, and a reference.
Gravitea Time
Problem 7.16
Data for Chapter 7
Problem 7.13
Image data for Chapter 7
Problem 7.18
Roman Broccoli
jpeg of the image for Problem 7.18
Smiley Face
image used in Figure 10.3
Data for Chapter 10
Problem 10.11
Mystery Image
Problem 10.16
Circular Conductor
Problem 11.18
Data for Chapter 12
Problem 12.14
Chapter 1 Notebook
Chapter 2 Notebook
Chapter 3 Notebook
Chapter 4 Notebook
Chapter 5 Notebook
Chapter 6 Notebook
Chapter 7 Notebook
Chapter 8 Notebook
Chapter 9 Notebook
Chapter 10 Notebook
Chapter 11 Notebook
Chapter 12 Notebook
Chapter 13 Notebook
Chapter 14 Notebook
Chapter 15 Notebook