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Category: Math

Matching a Location to a Track using Vector Operations

Matching a Location to a Track using Vector Operations

March 3, 2024February 11, 2025 Pygmalion
Introduction Map matching involves the projection of raw geographic coordinates to map data. For instance, we can match recorded GPS data to the actual course of the road, or in real time navigation, ... Read More
A Quick Refresher on Logarithms

A Quick Refresher on Logarithms

February 21, 2023March 1, 2023 Pygmalion
Logarithm If we write \[x^2 = 121\] it is obvious that we find \(x\) by taking the square root of 121, but what if the exponent is unknown? \[2^x = 8\] The unknown value of the exponent is called the ... Read More
Cartesian Coordinates with matplotlib

Cartesian Coordinates with matplotlib

April 5, 2021November 14, 2023 Pygmalion
In this post we’ll create an orthonormal Cartesian plane with x axis, y axis and origin, using matplotlib. If you’re using jupyter first include this line to get inline charts: %matplotlib... Read More
Dew Point Calculation in Java

Dew Point Calculation in Java

March 4, 2018March 3, 2024 Serge Helfrich
Introduction The core functionality of the Ersa library is all about calculating the dew point from temperature and humidity data. The dew point is used to assess environmental risks, like mold and co... Read More
The HC-SR04 ultrasound range finder on Raspberry Pi

The HC-SR04 ultrasound range finder on Raspberry Pi

March 7, 2015March 3, 2024 Pygmalion
Introduction The HC-SR04 can be used to measure distance and detect obstacles in robotic projects. However, the reported range is not always accurate, small objects are mostly not detected at all and ... Read More

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