$Path gives the default list of directories to search in attempting to find an external file.

Here is an example of an exact ODE. This verifies the solution. Here is a contour plot of the solution.

When you execute a command like NotebookWrite[obj,data] the actual operation of inserting data into your notebook is performed in the front end. Normally, however, the kernel ...

When you create or use Mathematica packages, you will often want to refer to files in a system-independent way. You can use contexts to do this. The basic idea is that on ...

Mathematica allows you not only to export graphics and sounds, but also to import them. With Import you can read graphics and sounds in a wide variety of formats, and bring ...

Mathematica provides a variety of functions for manipulating strings. Most of these functions are based on viewing strings as a sequence of characters, and many of the ...

MathLink allows you to call an external program from within Mathematica even when that program is running on a remote computer. Typically, you need to start the program ...

Finding lines that contain specified text. Here is a file containing some text. This returns a list of all the lines in the file containing the text is.

Sending email from Mathematica. The examples below require that the default mail account settings have been configured in the Internet Connectivity > Mail Settings tab of the ...

Methods for generating hyperlinks. A hyperlink is a special kind of button which jumps to another part of a notebook when it is pressed. Typically hyperlinks are indicated in ...