4.21.2 Greatest hits from previous weeks

4.21.2.1 Creating Mathematica packages

https://mathematica.stackexchange.com/questions/29324/creating-mathematica-packages

 
I'm building a package to help me write packages and their documentation. In this post I explained how to make a package and its documentation. In the answer I provided I describe how to build a very  ...
 

- asked by jmlopez (89 votes), answered by Leonid Shifrin (114 votes)

4.21.2.2 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 (17 votes)