Python Reading

• Browse Numerical & Scientific Computing with Python

Key Ideas

• Creating np arrays
• Slicing and reshaping arrays
• Operations on arrays such as broadcasting

In-Class Activity

• Download broadcast.py and study it until it is fully understood. The program illustrates the concept of broadcasting.

Active Learning

Work through tutorial2.py and then do the following:

1. Create a vector z with values ranging from 10 to 49
2. Reverse Z
3. Create a 3x3 matrix m with values ranging from 0 to 8
4. Create a 3x3x3 array r with random values
5. Create a 3x3 identity matrix
6. Can you figure out what the following code produces without running it first?

   z = np.zeros((5,5))
   z += np.arange(5)
   print(z)