If you've ever had to work with spreadsheets on a linux system, you may have stumbled across the PEAR Excel Spreadsheet Writer. Its a quite useful too, but installing it on your system may be a little misleading. Here's the quick rundown: # install php-pear sudo apt-get install php-pear # install PEAR …

Its very seldom, but now and then you have to go back to those old math equations from college and compute some nice graphs, or solve a few complex formulas. Linear Regressions aren't completely foreign territory, they are used more often than you realize. I've put together a nice function …

If you do much reporting I'm sure you've encountered needing to sum up a row, or divide, or average some data in a grid, much like you would do in Excel. Its actually not that difficult to whip up a simple, dynamic solution with javascript. I'm using jQuery, but it …