A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

Type to find tags:
× 365
Questions on correct (or improved) formulation of Mathematica code to achieve particular results. Use this tag (not "symbol") for questions about all those odd @@ /@ # & and ~ characters.
× 328
Questions on the use of the Table[] command and other functionality related to lists. Use [tag:matrix] for matrix algebra and related methods, and [tag:list-manipulation] for questions about transform…
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self-contained bundles of Mathematica code that add new functions and other functionality.
× 310
Questions on parallel computing in Mathematica.
× 308
Questions about random number generation and the properties of numbers so generated.
× 308
Questions seeking help understanding error messages and fixing errors.
× 300
Questions on the interpolation functions in Mathematica (Interpolation[], ListInterpolation[], FunctionInterpolation[], InterpolatingPolynomial[], etc.)
× 294
Questions on systematic data handling and analysis, including data correction, manipulation, or selection of user-data or built-in data available with Mathematica.
× 287
Tag for questions about bitmapped graphics, particularly those using the Image function.
× 275
Questions about the generation and use of compiled functions using Compile.
× 275
Questions on the functionality operating on polynomials
× 275
Questions on the special mathematical functions implemented in Mathematica.
× 268
Questions dealing with optional named arguments of Mathematica functions.
× 266
Questions about using complex numbers in Mathematica. This includes basic arithmetic, functions of complex numbers, plotting complex functions, and dealing with branch cuts.
× 252
For questions about distributions built-in in Mathematica, and functions that operate on them. Also includes questions about defining your own distributions.
× 237
For questions about defining recursive functions, recursive algorithms and solving recursive equations.
× 230
Questions on constructing graphical objects using relatively complex computations relating to the mathematical structures defining those objects. Examples include convex hulls, mathematical constructi…
× 229
Questions on Mathematica's ability to create "moving pictures" from its graphical output, including exporting these animations to other formats.
× 224
Questions on legends, figures (usually insets) that indicate what those lines/bars/points in plots refer to, using arrangements of graphic elements and text, whether manually or using built-in functio…
× 224
How to manipulate expressions structurally, not necessarily complying with the rules of algebra.
× 224
Questions on dealing with series data and constructing power series expansions of functions.
× 217
Questions using the Sum command, especially for series and other algebraic objects, and related functions such as SumConvergence
× 215
Questions on assigning and unassigning definitions to names that represent them, including issues raised by context and localization. Use tag [assignment] for issues relating to Set versus SetDelayed.
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Mathematical vectors, operations on vectors and vectorized programming.
× 205
the study of the visual representation of data, meaning "information that has been abstracted in some schematic form, including attributes or variables for the units of informati…
× 204
Since version 7, Mathematica includes gigabytes of curated data relevant to many different fields, including physics, chemistry, graph theory, finance, geography and many more.
× 202
Questions about Mathematica's functional programming style, including the use of pure functions (Function[], #, &) and functions such as Map, Apply, Nest, and Through.
× 201
Questions on the basic structure of the Mathematica language (Wolfram language) including atomic data types, syntax etc
× 198
The art of manipulating an algebraic expression into the desired form.
× 197
Questions on the application of Mathematica to geometric problems. You might also consider adding the [graphics] tag, if appropriate.
× 190
Questions on Mathematica's scoping constructs (Block, Module, With, etc.)
× 186
Questions on the Dataset data type and related functionality introduced in version 10. Do not use for questions on data in more generic list format or data-manipulation questions generally.
× 185
a sequence of well-defined steps that defines in abstract the solution to a problem.
× 180
Version-specific issues for Mathematica 10 (other than bugs).
× 178
Questions about RAM usage, including optimizing memory use, avoiding and fixing leaks and releasing unused memory.
× 177
Questions on obtaining files and directory structure/information and manipulating the said structure/information, searching/renaming particular files in a directory, etc., in an OS independent manner.