Skip to content

Website ToDos

Jump to bottom
dweintrop edited this page May 19, 2016 · 1 revision

IABM ToDo

Here are the two problems (explorations 11 & 12 from Chapter 3, p. 153). They are a little ambiguous as to which model to modify. I’d like to change them as below.

  1. Making sparks probabilistic Right now in the Fire Simple model as we extended it (extension 3), sparks from fires always occur when a new fire is started. Modify this so that whether sparks are generated is probabilistic in the same way that the fire spread was made probabilistic in the first extension. How does this modify the behavior of the Fire Simple extension 3 model?

  2. Random location of sparks After the third extension in the Fire Simple model, sparks are generated deterministically in the same place every time. This does not seem realistic, since real sparks probably jump to random nearby locations. Modify the Fire Simple extension 3 model so this is the case. How does this change the behavior of the model? Modify your model further by representing the sparks as turtles that can be visualized.

In chapter 3 explorations:

  1. In the Segregation Simple model, the agents look to their neighborhood composition to decide if they are happy. Can you make the size of shape of the neighborhood a parameter? How does this change the results of the model?

the size of shape of the neighborhood ——> the size or shape of the neighborhood

Please let me know when these last few errata are fixed.

P. 46

Figure 2.1 (A) Before. (B) After.

Figure 2.1 Living cells that are isolated, that is with less than two live neighbors, die. (A) Starred cell before applying rule (B) Next generation, after applying rule

Similar changes will be needed for the other figures

  1. Whereas the “ random ” primitive generates random whole number, here we use the “ random-float ” primitive so we can get probability values between 0 and 1.
	On the first page of Chapter 1, the quote Some look at things that are, and ask why? I dream of things that never were and ask why not? is attributed to John F. Kennedy. The attribution for the quote should more accurately read: John F. Kennedy, paraphrasing George Bernard Shaw.

This should be a chapter zero fix.

This text on the website needs to be made clearer.

Updates with a red bullet icon ( ) were present in the first edition of the book, but fixed for the second printing of the first edition. Updates with a blue icon ( ) are present in all versions of the book.

Clone this wiki locally