4.17.2 Greatest hits from previous weeks

4.17.2.1 Where can I find examples of good Mathematica programming practice?

https://mathematica.stackexchange.com/questions/18/where-can-i-find-examples-of-good-mathematica-programming-practice

 
I consider myself a pretty good Mathematica programmer, but I'm always looking out for ways to either improve my way of doing things in Mathematica, or to see if there's something nifty that I haven't  ...
 

- asked by J. M. (463 votes), answered by faysou (410 votes)

4.17.2.2 How can I plot the direction field for a differential equation?

https://mathematica.stackexchange.com/questions/8841/how-can-i-plot-the-direction-field-for-a-differential-equation

 
I'd like to plot the graph of the direction field for a differential equation, to get a feel for it.  I'm a novice, right now, when it comes to plotting in Mathematica, so I'm hoping that someone can  ...
 

- asked by Matt Groff (20 votes), answered by Peter Breitfeld (16 votes)