A function is a rule that is applied to one set of values to give another set of values. A function can be illustrated on a graph – points are plotted as coordinates and joined by either a straight ...

We hear a lot about lens sharpness; but what does it actually mean? It’s not easy to quantify but for images to appear sharp, both sharpness and contrast are involved. However, you can’t measure ...

Simpler and faster is always better in Excel. We start with some of my favorite shortcuts, then move on to using Excel for everyday situations such as finding random numbers for passwords, or random ...