You probably already know how to do standard graphs in Excel. Sometimes, you'll need to take it up another level and do logarithmical or semi-logarithmical graphs. Properly made graphs can give a concise and compact form of representation, while graphs made poorly can be misleading and very confusing. ...

Although converting an image (usually in true color) to grayscale can sound like a simple operation if you are used to image processing software, PHP doesn't have a function for this conversion by default. ...

As our life gets more and more complicated, we are much more susceptible to mistakes. How many times did you delete or modify a file before realizing the old version was much better? Things like this can be avoided by simply making backups of your files.. and why not do it automatically? ...

If you are studying engineering or science, sooner or later, you will need to learn how to use Matlab, a programming language which allows easy manipulation of numerical data and implementation of algorithms. This tutorial will help you understand the basic syntax and data types used by the language. ...

Did you always wonder how some people change their profile so often and always got something to say on their Yahoo! 360 profile? Time for you to learn this and use it for your account as well! ...