Intro

Create and Reshape a NumPy Array

~8 mincode completion
  1. Create a 1D array of integers from 1 to 12 (inclusive) using .
  2. Reshape it into a 3×4 matrix (3 rows, 4 columns).
  3. Return the reshaped matrix.

Hint: excludes stop. A 3×4 matrix has 3 rows and 4 columns.

Expected output : (3, 4)
Expected first row:    [1, 2, 3, 4]
Expected last row:     [9, 10, 11, 12]

Examples

Output shape is (3, 4)

Input
create_matrix()
shape of result
[3, 4]

First row is [1, 2, 3, 4]

Input
create_matrix()
first row of result
[1, 2, 3, 4]

Last element is 12

Input
create_matrix()
last element of result
12

Hints

Hint 1

Reshape so the two arrays broadcast against each other.

Hint 2

Watch for this: wrong range.

Requirements

  • Implement create_matrix and return its result.

Constraints

  • Allowed library: NumPy only

  • Time limit: 200 ms, Memory: 64 MB

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Python
import numpy as np

def create_matrix() -> np.ndarray:
    """
    Returns a 3x4 matrix containing integers 1 through 12.
    """
    # YOUR CODE HERE
    pass
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