Array Creation

Code

import numpy as np

a = np.array([1, 2, 3, 4])
b = np.array([[1, 2], [3, 4]], dtype=float)

zeros = np.zeros((2, 3))
ones = np.ones(5)
full = np.full((2, 2), 7)
eye = np.eye(3)
arange = np.arange(0, 10, 2)
linspace = np.linspace(0, 1, 5)
random = np.random.rand(2, 2)

print(a.shape, b.ndim, b.dtype)
print(eye)

Explanation

np.array() converts a list (or nested list) into an ndarray with an explicit dtype. Constructors like zeros, ones, eye, and full create arrays of a given shape without writing loops. arange and linspace produce evenly spaced ranges for sampling and plotting.

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