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Alex Powell
Alex Powell

189 Followers

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Published in

Level Up Coding

·Pinned

7 Must-Know Python Built-In Libraries

The Python Standard Library makes our lives as programmers a lot easier by providing a breadth of functionalities. We select a few libraries spanning data structures, filesystems, data persistence, and functional programming — which we deem most vital— to go over. Whether you are prepping for an interview or simply…

Programming

4 min read

7 Must-Know Python Built-In Libraries
7 Must-Know Python Built-In Libraries
Programming

4 min read


Published in

Level Up Coding

·Pinned

Solving a Hard Google Interview Question about Path Counting using Matrices

Interviewing at Google is tough. Put your coding and math chops to the test with this fun and challenging question from a past interview. The Question Given a graph G, count the number of unique k-step paths from node X to node Y for every pair of nodes X and Y.

Interview

4 min read

Solving a Hard Google Interview Question about Path Counting using Matrices
Solving a Hard Google Interview Question about Path Counting using Matrices
Interview

4 min read


Published in

Towards Data Science

·Pinned

Gaussian Process Regression

A conceptual guide — Gaussian processes (GPs) are a flexible class of nonparametric machine learning models commonly used for modeling spatial and time series data. A common application of GPs is regression. For example, given incomplete geographical weather data, such as temperature or humidity, how can one recover values at unobserved locations? If one…

Machine Learning

5 min read

Intro to Gaussian Process Regression
Intro to Gaussian Process Regression
Machine Learning

5 min read


Published in

Level Up Coding

·Aug 15, 2022

Everything You Should Know About JavaScript Runtimes

JavaScript is probably one of the most influential programming languages of all time (whether for good or bad) — it runs in almost every modern web browser regardless of the operating system. Whether you are using Safari, Chrome, or Firefox on MacOS, Windows, or Linux, JavaScript will be running behind…

JavaScript

7 min read

Everything You Should Know About JavaScript Runtimes
Everything You Should Know About JavaScript Runtimes
JavaScript

7 min read


Published in

Level Up Coding

·Aug 11, 2022

5 Must Know Languages for Data Science and Machine Learning

A Beginner’s Guide. — Table of Contents 1. Python 2. MATLAB 3. R 4. SQL 5. Bash 1. Python Many programmers’ first language is Python. It’s a high-level, general-purpose programming language with hundreds of thousands of open source packages. Python is used for game development, data analysis, machine learning, finance, and just about every application you…

Programming

7 min read

5 Must Know Languages for Data Science and Machine Learning
5 Must Know Languages for Data Science and Machine Learning
Programming

7 min read


Published in

Towards Data Science

·Aug 2, 2022

How to Level Up Your Terminal Game

6 Command Line Utilities to Improve Your Efficiency — For many new developers, using the terminal or command line might seem inefficient or even antiquated. However, the shell is one of the most useful tools available to any developer. In this article, I will show you six useful utilities to level up your terminal game! Table of Contents 1…

Software Development

8 min read

How to Level Up Your Terminal Game
How to Level Up Your Terminal Game
Software Development

8 min read


Published in

Level Up Coding

·Jul 28, 2022

6 Must Know Git/Github Features

You’re already familiar with Git basics: pushing and pulling, staging and committing files, merging and rebasing. Here are some slightly more advanced (yet useful) features we believe every programmer should know. 1. Creating a Pull Request You can create a pull request to propose updates to a public repository. First, navigate to the GitHub page…

Programming

4 min read

6 Must Know Git/Github Features
6 Must Know Git/Github Features
Programming

4 min read


Published in

Geek Culture

·Jul 10, 2022

What is it like to be Data Scientist at a Big Tech Company?

In a large-scale company that operates a service with hundreds of millions of clients or users, data is vital to constructing feedback loops and informing business strategy. A firm as large as Netflix or Google collects enormous amounts of data pertaining to everything from daily active users to advertisement conversion…

Data Science

3 min read

What is it like to be Data Scientist at a Big Tech Company?
What is it like to be Data Scientist at a Big Tech Company?
Data Science

3 min read


Published in

Geek Culture

·Mar 11, 2021

Kelly-Optimal Cryptocurrency Portfolios with Multiple Assets

A Case Study using Bitcoin, Ethereum, Cardano, and more. — Introduction The Kelly criterion is a well-known strategy for sizing bets to maximize long-run expected log wealth. It is widely applied to sports betting and casino gambling. Most sources provide coverage only for the single-asset case, however. We discuss the Kelly criterion for balancing a portfolio with multiple assets — taking…

Cryptocurrency

7 min read

Multi-Asset Kelly Optimal Cryptocurrency Portfolios
Multi-Asset Kelly Optimal Cryptocurrency Portfolios
Cryptocurrency

7 min read


Published in

Towards Data Science

·Jan 14, 2021

Ordinary Least Squares Regression

The definitive mathematical guide. — Ordinary least squares regression is a standard technique everyone should be familiar with. We motivate the linear model from the perspective of the Gauss-Markov Theorem, discern between the overdetermined and underdetermined cases, and apply OLS regression to a wine quality dataset. Contents The Linear Model The Gauss Markov Theorem The Underdetermined…

Data Science

8 min read

Ordinary Least Squares Regression
Ordinary Least Squares Regression
Data Science

8 min read

Alex Powell

Alex Powell

189 Followers

I write about data science, stats, ML, software, programming, and computing.

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