Implementing Core Machine Learning Algorithms in Python
1. Perceptron Algorithm Implementation
The Perceptron is a foundational linear classification algorithm. This implementation uses NumPy for efficient vector operations.
Perceptron Class Definition
import numpy as np, random
class Perceptron:
def __init__(self, eta=0.01, n_iter=50, random_state=1):
self.eta, self.n_iter, self.random_state = eta, n_iter, random_state
def fit(self, x, y):
rgen = np.random.RandomState(self.random_state)
self.w_ = rgen.normal(0, 0.01, 1 Read More
Key Techniques in Web Scraping and Text Processing
Web Scraping and Data Extraction
Core Web Technologies
A web page is built using several core technologies:
- HTML (HyperText Markup Language): Defines the content and structure of a web page. It is composed of tags organized in a tree-like structure.
- CSS (Cascading Style Sheets): Controls the design and presentation of a web page.
- JavaScript: Enables interactive actions and dynamic content on a web page.
Scraping Methods
Static Web Page Scraping
For static pages, you can use libraries like Beautiful Soup
Read MoreJava Array Fundamentals: Syntax, Indexing, and Code Examples
Java Array Fundamentals: Core Concepts and Syntax
Array Properties and Declaration
Fixed Size Property
Once an array is created, its size is fixed.
Valid Array Declarations (int values)
Which of the following are correct ways to declare an array of int values?
int[] a;int a[];
Valid Array Declarations (Mixed Types)
Which of the following statements are valid?
double d[] = new double[30];int[] i = {3, 4, 3, 2};
Incorrect Array Declarations and Initializations
Which of the following declarations or initializations
Read MoreUnderstanding Network Topologies, Protocols, and QoS
Understanding Network Topologies
Network topology refers to the arrangement of elements in a communication network, such as computers, routers, and switches. It plays a crucial role in determining a network’s performance, scalability, and reliability.
Significance of Topologies
- Efficient Communication: A well-structured topology ensures smooth data transfer.
- Scalability: A good topology helps in expanding the network easily.
- Fault Tolerance: Some topologies are resilient to failures, ensuring uninterrupted
Core Concepts in Database Management Systems (DBMS)
Data Abstraction and Its Three Levels in DBMS
Data abstraction is a logical function in a Database Management System (DBMS) that separates the raw data from the front end. It hides the complexities of how data is stored and managed, providing a simplified view of the data to users and applications. Since efficiency often requires complex data structures to represent data, developers hide this complexity from users through several levels of abstraction to simplify interactions with the system:
Physical
Read MoreHTML Elements Reference: Features and Demonstrations
HTML Elements Reference and Features
A complete demonstration of HTML elements and features.
Semantic Elements Text Elements Media Elements Forms Tables Interactive Elements
Semantic HTML Elements
Did You Know?
Semantic HTML elements provide meaning to content, making it more accessible to screen readers and search engines.
Click to expand semantic elements infoSemantic elements like header, nav, main, article, section, aside, and footer help structure content meaningfully.
Text Formatting Elements
This
