Select (Built-in Mathematica Symbol)

Select[list, crit] picks out all elements e_i of list for which crit[e_i] is True. Select[list, crit, n] picks out the first n elements for which crit[e_i] is True.

Balance Brackets and Braces (Mathematica How To)

All bracketing characters in Mathematica must be balanced. That is, every type of opening bracket must be balanced by a corresponding closing bracket. If there is an ...

Mathematical Constants (Mathematica Guide)

Mathematica incorporates the latest algorithms—some original to Wolfram Research—for evaluating mathematical constants to any number of digits of precision. For basic ...

Contexts (Mathematica Tutorial)

It is always a good idea to give variables and functions names that are as explicit as possible. Sometimes, however, such names may get inconveniently long. In Mathematica, ...

Drawing Tools (Mathematica Tutorial)

Type Ctrl+DynamicBox[If[$OperatingSystem === MacOSX, T, D], ImageSizeCache -> {9., {0., 8.}}] or choose Graphics > Drawing Tools. For more information on each tool, click the ...

Processing Textual Data (Mathematica Guide)

Mathematica has uniquely flexible capabilities for processing large volumes of textual data. Most often data represented as a string is converted to lists or other constructs ...

Low-Level Interface Control (Mathematica Guide)

The core of Mathematica's unique power for building interfaces is in its extremely flexible high-level symbolic paradigm. But Mathematica also allows you to build interfaces ...

Labeling Two-Dimensional Graphics (Mathematica Tutorial)

Ways to label two-dimensional plots. Here is a plot, using the default Axes->True. Setting Frame->True generates a frame with axes, and removes tick marks from the ordinary ...

EquationTrekker Package (Equation Trekker Package Tutorial)

This package provides an interactive tool for investigating the solutions of differential equations as well as other types of equations that have solutions that can be viewed ...

Setting Up Mathematica Packages (Mathematica Tutorial)

In a typical Mathematica package, there are generally two kinds of new symbols that are introduced. The first kind are ones that you want to 'export' for use outside the ...