Mathematica has special sparse-array technology for efficiently handling arrays with literally astronomical numbers of elements when only a small fraction of the elements are ...

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 ...

In doing many kinds of calculations, you need to evaluate expressions when variables take on particular values. In many cases, you can do this simply by applying ...

DirectedGraphQ[g] yields True if the graph g is a directed graph and False otherwise.

DirectionalMovement

AverageDirectionalMovementIndex

You can use the standard differential equation solving function, NDSolve , to numerically solve delay differential equations with constant delays. It returns an interpolation ...

Mathematica allows you to treat abstract 3D graphics using familiar physical metaphors. It provides not only real-time 3D manipulation, but also detailed programmatic control ...

SimpleGraph[g] gives the underlying simple graph from the graph g.

ViewVertical is an option for Graphics3D and related functions which specifies what direction in scaled coordinates should be vertical in the final image.