Digit Span Test (Online Tool)

The digit span test is a way of measuring the storage capacity of a person’s working memory: A testperson is visually or auditorily exposed to a sequence of digits one after the other. Right afterwards, the test subject has to recall the correct digits in the same order. Most people manage to recap around seven digits. I have written an online tool that lets the user determine their digit span test score. It is available at the website tools.timodenk.com/digit-span-test. Continue reading Digit Span Test (Online Tool)

Cubic Spline Interpolation

Cubic spline interpolation is a mathematical method commonly used to construct new points within the boundaries of a set of known points. These new points are function values of an interpolation function (referred to as spline), which itself consists of multiple cubic piecewise polynomials. This article explains how the computation works mathematically.

After an introduction, it defines the properties of a cubic spline, then it lists different boundary conditions (including visualizations), and provides a sample calculation. Furthermore, it acts as a reference for the mathematical background of the cubic spline interpolation tool on tools.timodenk.com which is introduced at the end of the article. Continue reading Cubic Spline Interpolation

Typing Speed, Point Set Creator, and Poker Hands

This post summarises what I’ve been coding during the last week. That’s two new web tools for my Online-Tools webpage called Typing Speed and Point Set Creator, and in addition to that a mobile-first Poker Hands website. Continue reading Typing Speed, Point Set Creator, and Poker Hands