Tower of Hanoi is a mathematical puzzle where we have three rods and n disks. The objective is to move the entire stack to another rod, and follow some simple rules.

Text is a very important unstructured data, and how to represent text data has been an important research direction in the field of machine learning. In this article, I will only discuss the very basic methods, such as Bag of Words, TF-IDF (Term Frequency Inverse Document Frequency), Topic Model, and Word Embedding.

Without sufficient data and suitable features, the most powerful model structure cannot get satisfactory output. As a classic saying goes, "Garbage in, garbage out." For a machine learning problem, the data and features often determine the upper limit of the results, while the selection of models, algorithms and optimization are gradually approaching this upper limit.

The dream of early retirement. Most people are not able to do so. Therefore, we should do a good job of financial planning while we are young. It is not impossible to make a lot of profit from investments. In essence, there are two methods to do investment, fundamental analysis and technical analysis. Fundamental analysis considers all the factors that affect a company's financial and profitability factors. Technical analysis side is to look at the line chart, indicators, etc.

Coursera is the global online learning platform that offers anyone, anywhere access to online courses and degrees from world-class universities and companies. If you can’t afford to pay for a Certificate, you can apply for Financial Aid or a Scholarship through the link on the course home page. Learners with Financial Aid or Scholarships in a course will be able to access all of the course content and complete all work required to earn a Course Certificate. Financial Aid and Scholarships only apply to the course that the application was approved for.

Sudoku is a logic-based, combinatorial number-placement puzzle. In classic sudoku, the objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contain all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a single solution.

In this article, I'll try and show that e, sometimes called Euler's number, is an irrational number 2.718281828459045.... Euler's number is a fantastic number, and it plays a role in just about every aspect of physics, maths, and statistics. There are many ways of calculating the value of e, but none of them ever give a totally exact answer, because e is irrational and its digits go on forever without repeating.

Singular Value Decomposition (SVD) is a widely used technique to decompose a matrix into several component matrices, exposing many of the useful and interesting properties of the original matrix.

In this article, first, I'll populate crypto database using Python and SQL. I retrieve the list of crypto coin assets, verify the data, and tackle any errors I encounter along the way. Second, I'll talk about how to keep the database up to date with the latest prices, and retrieve daily data from the yahoo finance API. Third, a database for twitter data will be built as well. Finally, I'll set up to build a web UI using FastAPI.

Time series prediction has been widely applied to the finance industry in applications such as stock market price and commodity price forecasting. Machine learning methods have been widely used in financial time series prediction in recent years. How to label financial time series data to determine the prediction accuracy of machine learning models and subsequently determine final investment returns is a hot topic.

This article is about implementing "Eigenvectors from eigenvalues" of Terence Tao's paper using Python and R. It's a amazing work and mathematics contribution from Terence Tao. It is an elegant non-evident result, which makes me so excited about it!

Happy π Day 2021! In this article I'll estimate the digits of π with random numbers and the probability of two integers being co-prime. What is the probability of two random integers being coprime? Euclidean Algorithm can be used to estimate π!

Principal Component Analysis (PCA) is an important technique to understand in the fields of statistics and data science. It is a process of computing the principal components and utilising then to perform a change of basis on the data. For the purpose of visualisation, it is very hard to visulaise and understand the data in high dimensions, this is where PCA comes to the rescue.

In Data Science interviews, one of the frequently asked questions is 'What is P-Value?'. It's hard to grasp the concept behind p-value. To understand p-value, you need to understand some background and context behind it.

When I was doing my dissertation project, I found out that the performance of model wasn't quite well. I believe it's because the domain of pre-trained GoogleNews-vectors-negative300 is different from the the dataset of mine. Hence, I decide to pre-train a word2vec model by myself.

The objective of this task is to detect hate speech in tweets. For the sake of simplicity, let's say a tweet contains hate speech if it has a racist or sexist sentiment associated with it. So, the task is to classify racist or sexist tweets from other tweets.

Google Colab notebooks have an idle timeout of 90 minutes and absolute timeout of 12 hours. This means, if user does not interact with his Google Colab notebook for more than 90 minutes, its instance is automatically terminated. Also, maximum lifetime of a Colab instance is 12 hours.

Sometimes the code I write may not work in my local machine, however, it works in Google Colab. So, I wanna connect to Google Colab terminal using SSH.