This video explains how the dollar sign is used in Excel formulas to control whether cell references stay fixed or change ...

Microsoft's spreadsheet program can do way more than you might imagine. These are the hacks and tricks you need to know.

Abstract: In a paper by Willems et al., it was shown that persistently exciting data can be used to represent the input-output behavior of a linear system. Based on this fundamental result, we derive ...

Numbers in rows tell one story, but charts and graphs reveal patterns you might otherwise miss. Create a simple line graph ...