## More on Parameterized Jupyter

I’d like to share a great new feature in the wvpy package (available at PyPi). This package is useful in converting Jupiter notebooks to/from python, and also in rendering many parameterized notebooks. The idea is to make Jupyter notebook easier to use in production. The latest feature is an extension […]

## What a Data Engineer Needs to Know About Bitemporal Modeling

A central data science engineering problem is how to organize general data into columns for analysis. I often refer to this as denormalization, or the deliberate arranging of data so all entries of a record are in a single row in a single table. In this note I will write […]

## Separating Code from Presentation in Jupyter Notebooks

One of the great conveniences of performing a data science style analysis using Jupyter is that Jupyter notebooks are literate containers that combine code, text, results, and graphs. This is also one of the pain points in working with Jupyter notebooks with partners or with source control. That is: Jupyter […]

## Method Warnings

Introduction The data algebra is a Python system for designing data transformations that can be used in Pandas or SQL. The new 1.3.0 version introduces a lot of early checking and warnings to make designing data transforms more convenient and safer. An Example I’d like to demonstrate some of these […]

## Data Algebra Method Catalog

The data algebra is a system for specifying data transformations in Pandas or SQL databases. To use it, we advise checking out the README and introduction. These document what data operators are the basis of data algebra transformation construction and composition. I have now added a catalog of what expression […]

## Composing Queries in the Data Algebra

When working with multiple data tables we often need to know how for a given set of keys, how many instances of rows each table has. I would like to use such an example in Python as yet another introduction to the data algebra (an alternative to direct Pandas or […]

## data_algebra 0.7.0 What is New

I’ve been tinkering a lot recently with the data_algebra, and just released version 0.7.0 to PyPi. In this note I’ll touch on what the data algebra is, what the new features are, and my plans going forward.

## R is Getting an Official Pipe Operator

It looks like R is getting an official pipe operator (ref). R doesn’t work under an RFC process, so we hear about these things and they are discussed on the R-devel mailing list. I’ve written on this topic before (ref), and I have taped some new comments. This sort of […]

## Genetic Art Introduction Video

Nina and I are cleaning up websites, links, and projects. I would like to take the opportunity re-share my old genetic art project through a short demonstration video. Read more about the Genetic Art Project here.

## knotEd: Knot Diagram Editing Software

I’d like to share a video of my old knot editing software in action. Read more about KnotEd here.