SignalFrame and the IoT — Source: Next Step in Government Data Tracking Is the Internet of Things. (2020, November 28). Wall Street Journal The US Air Force awarded a $50,000 grant to commercial platform SignalFrame, a Washington DC based wireless technology company. SignalFrame uses cellphone data to tap into any peripheral devices connected to the…

a beginner’s primer on vectors, dot products, and linear independence If you don’t have much training in linear algebra it’s hard crack open a textbook and identify the most important concepts. You can get lost in all the examples. This post describes three of the most important concepts in linear…

A beginners guide to unpacking and customizing the elements of a D3 axis Introduction We will make a horizontal axis and customize it in different ways using D3 methods and CSS selections. First I’ll show you how to render a basic horizontal axis from a linear scale. Then we will learn…

Boost your intuition for matrix multiplication from the ground up When I first learned about matrix multiplication I was surprised by how hard it was for me to develop intuition about the operation. The usual definition of matrix multiplication hides a lot of interesting facts that are easier to recognize…

From basic concepts to not so basic concepts Linear regression is the first step to understanding machine learning. We start our exploration into linear regression by considering simplest possible situation — linear functions. A linear function New York University (NYU), like most schools, charges its part-time students by credit-hour. …

Outcomes, sample spaces, and events In part 1 we considered some examples of random experiments and sketched some probability concepts that we will cover more thoroughly later. In particular we decided that the probability of tossing heads in one flip of a coin should be 1/2. This was easy because…

A few examples to start with Probability theory is the among the most fascinating subjects you can study. It comes with an enormous variety of fascinating concrete examples and challenging problems. But if you crack open any graduate-level textbook on probability you will notice that mathematicians and statisticians use on…