Skip to content
Do not go softly into that good R²

Do not go softly into that good R²

While ordinary least squares regression can be an unreasonably effective tool, it can pay dividends to dig deeper. The original chart shows a simple linear fit between AI subscription rates and private payroll changes, yielding a modest R² of 0.2111. However, running the diagnostic plots revealed a couple of

Members Public
Most bad maps are the same bad map

Most bad maps are the same bad map

Wow, would you look at that. All that economic output from just these five countries that don't even occupy the most area! This is a classic. Economic activity, like deaths and a host of other social and political aspects, is roughly proportional to population. Showing the raw numbers

Members Public

Excel to Julia: The Rosetta Stone

For when your spreadsheet starts to crawl, but you still need to get the job done. 1. The Basics: Data as a Thing In Excel, the data and the logic live in the same cell. In Julia, we keep them separate for speed and sanity. * Workbook/Sheet ≅ DataFrame * Column ≅:Symbol

Members Public

Using the forum at Julialang.org

The Julia language organization maintains an open, free forum where you can post questions to the helpful users under the New to Julia category. Especially if your question involves advanced scientific capabilities of the language, such as tensors, it will be invaluable. On the other hand … If you are an

Members Public

Age pyramids

The age pyramid is a useful tool in demographic analysis. It visualizes the relative proportion of population by sex and age cohort. The shape of the curve can indicate an excess of deaths over births and give an idea of the sufficiency of the working age population to support the

Members Public
Do It Yourself Bullseye Maps

Do It Yourself Bullseye Maps

Do It Yourself Bullseye Maps Bullseye maps are useful for orientation at the regional level. These are easy to assemble through the facilities of the Open Maps Project using the Leaflet API. Most of what this function does is to output HTML code with Javascript, which does the work. The

Members Public
A Google NotebookLM Review

A Google NotebookLM Review

Dear Diary, I know, I know. Two things that some viewers may not like. This is an advertisement, an infomercial, for Julia Mapping: A Practical Guide, now available on Amazon. It was written, and narrated, by Google's NotebookLM. If, for no other reason, listen to hear how incredibly

Members Public
Liftoff!

Liftoff!

This is The Diary of a Mad Data Scientist, a brand new site by Richard Careaga that's just getting started. Things will be up and running here shortly, but you can subscribe in the meantime if you'd like to stay up to date and receive emails

Members Public