Published in Dev Genius·Feb 7Member-onlyApache Arrow Schema CreationCreating an Apache Arrow Schema for SEC Edgar API Data What is Apache Arrow? A cross-language development platform for in-memory analytics A slightly longer description: Apache Arrow defines a language-independent columnar memory format for flat and hierarchical data, organized for efficient analytic operations on modern hardware like CPUs and GPUs. …Apache Arrow10 min readApache Arrow10 min read
Published in DataDrivenInvestor·Oct 30, 2022Member-onlyPortfolio Statistics with Java, Jupyter & YahooFinanceQuantitative Portfolio Analysis Calculating fundamental portfolio statistics is a requisite to more complex analysis of portfolio attributes and performance, such as evaluating the risk adjusted rate of return (Sharpe Ratio) to optimize allocation of capital within a portfolio, performing benchmark analysis (S&P 500 vs Portfolio Returns), or using Capital Asset Pricing Model (CAPM)…Java9 min readJava9 min read
Oct 3, 2022Member-onlyGoogle Colab Recap (May 2022)A list of articles about Google Colab published on Medium and elsewhere in May, 2022. NOTE: Some of the below articles are not ‘about’ Google Colab, but instead use Google Colab as the workspace for demonstration, proof of concept, research, etc. For articles not written in your preferred language, don’t…Google Colab3 min readGoogle Colab3 min read
Published in DataDrivenInvestor·Sep 16, 2022Member-onlyYahooFinance with Tablesaw (Java) and Google ColabYahoo Finance has been a great source for news, stock analysis, portfolio management, & a wide range of financial data sets. The free version provides access to up to 5 years of financial statements (cash flow, income & balance sheet statements), as well as current & historical stock prices. …Finance7 min readFinance7 min read
Published in Dev Genius·Jul 20, 2022Member-onlyQuery Financial Statements from SEC Data using Tablesaw for JavaUse Tablesaw for Java to Build Dataframes for Analyzing Balance Sheets, Income & Cash Flow Statements, etc. As a novice investor, and adequate software & data engineer, I’ve started applying my professional skills… to duplicating the work of many stock newbs & data wranglers before me, all in an attempt…Google Colab14 min readGoogle Colab14 min read
Jul 16, 2022Google Colab Recap (April 2022)A list of articles about Google Colab published on Medium and elsewhere in April, 2022. NOTE: Some of the below articles are not ‘about’ Google Colab, but instead use Google Colab as the workspace for demonstration, proof of concept, research, etc. For articles not written in your preferred language, don’t…Google Colab3 min readGoogle Colab3 min read
May 6, 2022Member-onlyGoogle Colab Recap (March 2022)A list of articles about Google Colab published on Medium and elsewhere in March, 2022. NOTE: Some of the below articles are not ‘about’ Google Colab, but instead use Google Colab as the workspace for demonstration, proof of concept, research, etc. Don’t Forget: For articles not written in your preferred…Google Colab5 min readGoogle Colab5 min read
May 3, 2022Member-onlyTerraform a Database for Financial Statements using Amazon Athena & GluePrologue Making money on Wall Street is the dream of every entrepreneurial teenager with a computer. If you’re new to Machine Learning, you might also think you are one of a lucky few that can apply your new found skills to print money to your bank account with the savvy application…Google Colab10 min readGoogle Colab10 min read
Published in Dev Genius·Apr 2, 2022Member-onlyIO Parquet with Java on JupyterRead/Write Parquet with Tablesaw in Java on Google Colab (Jupyter). Introduction We’re going to take a quick tour of Apache Parquet using Java on Google Colab. This is possible with the help of the IJava Kernel for Jupyter written by Spencer Park.Google Colab6 min readGoogle Colab6 min read
Mar 25, 2022Member-onlyApache Spark Vectors & Matrices using Java on JupyterIntroduction Creating Vectors and Matrices in Spark requires some study and a fair amount of practice. There are numerous options to choose from, each with specific benefits and practical applications. …Apache Spark8 min readApache Spark8 min read
