## All posts

# 2017

- October 15, 2017 - Covariate Shift, i.e. Why Prediction Quality Can Degrade In Production and How To Fix It
- August 27, 2017 - An Annotated Proof of Generative Adversarial Networks with Implementation Notes
- July 26, 2017 - A Tour of Gotchas When Implementing Deep Q Networks with Keras and OpenAi Gym
- June 18, 2017 - Visualizing the Learning of a Neural Network Geometrically
- March 19, 2017 - Dealing with Trends. Combine a Random Walk with a Tree-Based Model to Predict Time Series Data
- March 5, 2017 - (My Opinion of) Best Practices for a Data Scientist in Industry
- February 26, 2017 - Leveraging Factorization Machines for Wide Sparse Data and Supervised Visualization

# 2016

- December 27, 2016 - Bayesian Hierarchical Modeling Applied to Fantasy Football Projections for Increased Insight and Confidence
- September 5, 2016 - Making Fantasy Football Projections Via A Monte Carlo Simulation
- June 29, 2016 - Build Your Own Event-Based Backtester in Python
- May 30, 2016 - Parsing HTML Tables in Python with BeautifulSoup and pandas
- May 8, 2016 - Detect Communities in Your Steam Friends List with the Steam Web API and Graph Theory
- May 1, 2016 - Why Blurring an Image is Similar to Warming Your Coffee
- April 24, 2016 - On Solving Partial Differential Equations with Brownian Motion in Python
- April 17, 2016 - Eigen-vesting IV. Predicting Stock and Portfolio Returns With Bayesian Methods
- April 5, 2016 - Train a Neural Network to Play Black Jack with Q Learning
- April 1, 2016 - Making a Markov Chain Twitter Bot in Python
- March 30, 2016 - Eigen-vesting III. Random Matrix Filtering in Finance
- March 28, 2016 - Connect The Dots. Least Squares, Linear Regression, and Bayesian Regression
- March 26, 2016 - Don't Solve-- Simulate! Markov Chain Monte Carlo Methods with PyMC3.
- March 22, 2016 - Eigen-vesting II. Optimize Your Portfolio With Optimization
- March 18, 2016 - Eigen-vesting I. Linear Algebra Can Help You Choose Your Stock Portfolio
- March 14, 2016 - How to Use Math to Win at Fantasy Football With a Lineup Optimizer
- March 13, 2016 - Blogging with iPython using Jekyll
- March 12, 2016 - Jitter, Convolutional Neural Networks, and a Kaggle Framework

## Machine Learning

- - Covariate Shift, i.e. Why Prediction Quality Can Degrade In Production and How To Fix It, Describes the Kullback-Leibler Importance Estimation Procedure and introduces a python package to use it.
- - An Annotated Proof of Generative Adversarial Networks with Implementation Notes, Exploring gotchas associated with coding your own DQN implementation based on Google DeepMind's Nature paper.
- - A Tour of Gotchas When Implementing Deep Q Networks with Keras and OpenAi Gym, Exploring gotchas associated with coding your own DQN implementation based on Google DeepMind's Nature paper.
- - Visualizing the Learning of a Neural Network Geometrically, Walking through how to visualize the training process of a neural network.
- - Dealing with Trends. Combine a Random Walk with a Tree-Based Model to Predict Time Series Data, Using statistics and machine learning for time series data.
- - (My Opinion of) Best Practices for a Data Scientist in Industry, Giving unsolicited advice to upcoming Data Scientists.
- - Leveraging Factorization Machines for Wide Sparse Data and Supervised Visualization, A nonlinear model and visualization approach great for sparse data.
- - Train a Neural Network to Play Black Jack with Q Learning, It turns out the traditional "stay at 15" is almost the best strategy.
- - Jitter, Convolutional Neural Networks, and a Kaggle Framework, A recipe for approaching Kaggle competitions.

## Practical

- - A Tour of Gotchas When Implementing Deep Q Networks with Keras and OpenAi Gym, Exploring gotchas associated with coding your own DQN implementation based on Google DeepMind's Nature paper.
- - (My Opinion of) Best Practices for a Data Scientist in Industry, Giving unsolicited advice to upcoming Data Scientists.
- - Bayesian Hierarchical Modeling Applied to Fantasy Football Projections for Increased Insight and Confidence, How to make fantasy football projections better with Bayesian techniques.
- - Making Fantasy Football Projections Via A Monte Carlo Simulation, How to make fantasy football projections with historic data and Monte Carlo techniques.
- - Build Your Own Event-Based Backtester in Python, Use multiprocessing to speed up your backtesting!
- - Parsing HTML Tables in Python with BeautifulSoup and pandas, How to use BeautifulSoup and pandas to grab data from the web.
- - Detect Communities in Your Steam Friends List with the Steam Web API and Graph Theory, Using discrete math to analyze your Steam friends.
- - Train a Neural Network to Play Black Jack with Q Learning, It turns out the traditional "stay at 15" is almost the best strategy.
- - Making a Markov Chain Twitter Bot in Python, For those of you who want to spam their followers with gibberish.
- - Eigen-vesting III. Random Matrix Filtering in Finance, Part three in a Series on How Math Fits in Modern Portfolio Theory
- - Don't Solve-- Simulate! Markov Chain Monte Carlo Methods with PyMC3., A lightning tour of PyMC3 and Bayesian inference to solve (somtimes frustrating or impossible) pen and paper problems.
- - Eigen-vesting II. Optimize Your Portfolio With Optimization, Part Two in a Series on How Math Fits in Modern Portfolio Theory
- - Eigen-vesting I. Linear Algebra Can Help You Choose Your Stock Portfolio, A Series on How Math Fits in Modern Portfolio Theory
- - How to Use Math to Win at Fantasy Football With a Lineup Optimizer, All the math in the world won't guarantee a win, but it could help.
- - Jitter, Convolutional Neural Networks, and a Kaggle Framework, A recipe for approaching Kaggle competitions.

## Blog

- - Blogging with iPython using Jekyll, Converting code to blogs with iPython.

## Math

- - Leveraging Factorization Machines for Wide Sparse Data and Supervised Visualization, A nonlinear model and visualization approach great for sparse data.
- - Bayesian Hierarchical Modeling Applied to Fantasy Football Projections for Increased Insight and Confidence, How to make fantasy football projections better with Bayesian techniques.
- - Making Fantasy Football Projections Via A Monte Carlo Simulation, How to make fantasy football projections with historic data and Monte Carlo techniques.
- - Why Blurring an Image is Similar to Warming Your Coffee, Showing the connection between the heat equation and the Gaussian blur.
- - On Solving Partial Differential Equations with Brownian Motion in Python, When random walks solve deterministic equations
- - Eigen-vesting IV. Predicting Stock and Portfolio Returns With Bayesian Methods, Part four in a Series on How Math Fits in Modern Portfolio Theory
- - Making a Markov Chain Twitter Bot in Python, For those of you who want to spam their followers with gibberish.
- - Eigen-vesting III. Random Matrix Filtering in Finance, Part three in a Series on How Math Fits in Modern Portfolio Theory
- - Connect The Dots. Least Squares, Linear Regression, and Bayesian Regression, Sometimes it helps to draw a line or two.
- - Don't Solve-- Simulate! Markov Chain Monte Carlo Methods with PyMC3., A lightning tour of PyMC3 and Bayesian inference to solve (somtimes frustrating or impossible) pen and paper problems.
- - Eigen-vesting II. Optimize Your Portfolio With Optimization, Part Two in a Series on How Math Fits in Modern Portfolio Theory
- - Eigen-vesting I. Linear Algebra Can Help You Choose Your Stock Portfolio, A Series on How Math Fits in Modern Portfolio Theory
- - How to Use Math to Win at Fantasy Football With a Lineup Optimizer, All the math in the world won't guarantee a win, but it could help.

## Sports

- - Bayesian Hierarchical Modeling Applied to Fantasy Football Projections for Increased Insight and Confidence, How to make fantasy football projections better with Bayesian techniques.
- - Making Fantasy Football Projections Via A Monte Carlo Simulation, How to make fantasy football projections with historic data and Monte Carlo techniques.
- - How to Use Math to Win at Fantasy Football With a Lineup Optimizer, All the math in the world won't guarantee a win, but it could help.

## Finance

- - Build Your Own Event-Based Backtester in Python, Use multiprocessing to speed up your backtesting!
- - Eigen-vesting IV. Predicting Stock and Portfolio Returns With Bayesian Methods, Part four in a Series on How Math Fits in Modern Portfolio Theory
- - Eigen-vesting III. Random Matrix Filtering in Finance, Part three in a Series on How Math Fits in Modern Portfolio Theory
- - Eigen-vesting II. Optimize Your Portfolio With Optimization, Part Two in a Series on How Math Fits in Modern Portfolio Theory
- - Eigen-vesting I. Linear Algebra Can Help You Choose Your Stock Portfolio, A Series on How Math Fits in Modern Portfolio Theory

## Theory

- - Covariate Shift, i.e. Why Prediction Quality Can Degrade In Production and How To Fix It, Describes the Kullback-Leibler Importance Estimation Procedure and introduces a python package to use it.
- - An Annotated Proof of Generative Adversarial Networks with Implementation Notes, Exploring gotchas associated with coding your own DQN implementation based on Google DeepMind's Nature paper.
- - Visualizing the Learning of a Neural Network Geometrically, Walking through how to visualize the training process of a neural network.
- - Dealing with Trends. Combine a Random Walk with a Tree-Based Model to Predict Time Series Data, Using statistics and machine learning for time series data.
- - Leveraging Factorization Machines for Wide Sparse Data and Supervised Visualization, A nonlinear model and visualization approach great for sparse data.
- - Why Blurring an Image is Similar to Warming Your Coffee, Showing the connection between the heat equation and the Gaussian blur.
- - On Solving Partial Differential Equations with Brownian Motion in Python, When random walks solve deterministic equations
- - Eigen-vesting IV. Predicting Stock and Portfolio Returns With Bayesian Methods, Part four in a Series on How Math Fits in Modern Portfolio Theory
- - Train a Neural Network to Play Black Jack with Q Learning, It turns out the traditional "stay at 15" is almost the best strategy.
- - Making a Markov Chain Twitter Bot in Python, For those of you who want to spam their followers with gibberish.
- - Connect The Dots. Least Squares, Linear Regression, and Bayesian Regression, Sometimes it helps to draw a line or two.
- - Don't Solve-- Simulate! Markov Chain Monte Carlo Methods with PyMC3., A lightning tour of PyMC3 and Bayesian inference to solve (somtimes frustrating or impossible) pen and paper problems.

## Statistics

- - Dealing with Trends. Combine a Random Walk with a Tree-Based Model to Predict Time Series Data, Using statistics and machine learning for time series data.

## Reinforcement Learning

- - A Tour of Gotchas When Implementing Deep Q Networks with Keras and OpenAi Gym, Exploring gotchas associated with coding your own DQN implementation based on Google DeepMind's Nature paper.

## Python

- - Why Blurring an Image is Similar to Warming Your Coffee, Showing the connection between the heat equation and the Gaussian blur.

## Data

- - (My Opinion of) Best Practices for a Data Scientist in Industry, Giving unsolicited advice to upcoming Data Scientists.
- - Parsing HTML Tables in Python with BeautifulSoup and pandas, How to use BeautifulSoup and pandas to grab data from the web.
- - Detect Communities in Your Steam Friends List with the Steam Web API and Graph Theory, Using discrete math to analyze your Steam friends.