Quiz 2

Module 3: NumPy

import numpy as np

arr = np.arange(4)
# Return evenly spaced values within a given interval.

arr_bool = np.array([True, False, True, False, True])
selected = arr[arr_bool]

import numpy as np

x = np.array(
    [[1, 2],
    [3, 4]]
)
x[1, :] = 0

print(x)

import numpy as np

a = np.array([1, 2, 3])
b = np.array([[4, 5, 6], [7, 8, 9]])
c = b > a

print(c)

import numpy as np

games = np.array(
        [[0, 1, 0],
         [1, 0, 0],
         [0, 1, 0]]
)

# Make Python choose door number 2
print(games[:, 1])

# Compute our avg. gains
gains = np.sum(games) / len(games)

print(gains)

import numpy as np

a = np.zeros(3).astype(float)

c = np.ones(5, dtype=bool)
d = np.ones((5, 5))
b = np.zeros(3, 3)