I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

Daniel Liberto is a journalist with over 10 years of experience working with publications such as the Financial Times, The Independent, and Investors Chronicle. Erika Rasure is globally-recognized as ...

From electronic health records and blood tests to the stream of data from wearable devices, the amount of health information people generate is accelerating rapidly. Yet, many users struggle to ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Power BI has long supported custom functions in Power Query, however now DAX User Defined Functions (UDFs) provide similar capabilities. DAX UDFs allow you to define custom functions with parameters, ...

The FIND function allows you to find a text string within another. It returns the position at which a character or string begins within another text string. The LEN function calculates the length of ...

In September 2025, Microsoft unveiled DAX User-Defined Functions (UDFs) in Power BI (public preview) – one of the most significant enhancements to the DAX language to date. This report summarizes the ...

DAX user-defined functions are currently in preview. Data Analysis Expressions (DAX) user-defined functions (UDFs) let you package reusable, parameterized DAX logic into your models making your DAX ...

Python has a behavior that is not universal among programming languages, and if you have experience with, say Java, you might find this surprising. Let’s walk through what’s happening. Why does this ...

In social settings, it’s common to ask, “What do you do?”—a question that often serves as a proxy for understanding someone’s identity. However, equating our professions with our sense of self can be ...

In this valuable study, the authors integrate several datasets to describe how the genome interacts with nuclear bodies across distinct cell types and in Lamin A and LBR knockout cells. They provide ...

Q. Could you explain how the AGGREGATE function works in Excel? A. AGGREGATE is possibly the most versatile function in Excel. Think of it as an advanced version of the SUBTOTAL function that offers ...