Machine Learning Hero

Practical Exercises: Chapter 2

Exercise 1: Working with NumPy Arrays

Task: Create a NumPy array with the values [10, 20, 30, 40, 50]. Reshape it into a 2x3 array and calculate the sum of all elements.

Solution:

import numpy as np

# Create a NumPy array

array = np.array([10, 20, 30, 40, 50, 60])

# Reshape the array into 2x3

reshaped_array = array.reshape(2, 3)

# Calculate the sum of all elements

total_sum = np.sum(reshaped_array)

print("Reshaped Array:\\\\n", reshaped_array)

print("Total Sum:", total_sum)

Exercise 2: Basic Data Manipulation with Pandas

Task: Create a Pandas DataFrame with the following data:

Name	Age	Salary
Alice	25	50000
Bob	30	60000
Charlie	35	70000
David	40	80000

Then: ...