Excel's PIVOTBY function allows you to group your figures without needing to recreate your data in a PivotTable. What's more, ...

Posey's Tips & Tricks. How To Validate Input in PowerShell Functions, Part 1. If your automated script takes action based on a value, it's critical to make sure the value is correct.

A function has three general tasks it can perform; it optionally takes an input, does some processing and optionally sends something out. In this article, I'd like to go over a few different ways in ...

Visualizing Functions as Graphs. In the applet below is intended to help you understand the connection between the graph of a function and the function itself. Recall that a function can be thought of ...

Input variables and transfer functions for them may be specified using the INPUT= option on the ESTIMATE statement. The variables used on the INPUT= option must be included in the CROSSCORR= list in ...

Posey's Tips & Tricks. How To Validate Input in PowerShell Functions, Part 2. As Brien demonstrates, string validation is not the only type of input validation that PowerShell can perform.