Atable is an arrangement ofinformation ordata, typically in rows and columns, or possibly in a more complex structure. Tables are widely used incommunication,research, anddata analysis. Tables appear in print media, handwritten notes, computer software, architectural ornamentation, traffic signs, and many other places. The precise conventions and terminology for describing tables vary depending on the context. Further, tables differ significantly in variety, structure, flexibility, notation, representation and use.[1][2][3][4][5] Information or data conveyed in table form is said to be intabular format (adjective). In books and technical articles, tables are typically presented apart from the main text in numbered and captionedfloating blocks.
A table consists of an ordered arrangement ofrows andcolumns. This is a simplified description of the most basic kind of table. Certain considerations follow from this simplified description:
The elements of a table may be grouped, segmented, or arranged in many different ways, and even nestedrecursively. Additionally, a table may includemetadata,annotations, a header,[6] afooter or other ancillary features.[5]
The following illustrates a simple table with four columns and nine rows. The first row is not counted, because it is only used to display the column names. This is called a "header row".
| First name | Last name | Age | Gender |
|---|---|---|---|
| Tinu | Elejogun | 14 | F |
| Javier | Zapata | 28 | M |
| Lily | McGarrett | 18 | F |
| Olatunkbo | Chijiaku | 22 | M |
| Adrienne | Anthoula | 22 | M |
| Axelia | Athanasios | 22 | M |
| Jon-Kabat | Zinn | 22 | M |
| Thabang | Mosoa | 15 | F |
| Rhian | Ellis | 12 | M |
The concept ofdimension is also a part of basic terminology.[7] Any "simple" table can be represented as a "multi-dimensional"table bynormalizing the data values into orderedhierarchies. A common example of such a table is amultiplication table.
| × | 1 | 2 | 3 |
|---|---|---|---|
| 1 | 1 | 2 | 3 |
| 2 | 2 | 4 | 6 |
| 3 | 3 | 6 | 9 |
In multi-dimensional tables, each cell in the body of the table (and the value of that cell) relates to the values at the beginnings of the column (i.e. the header), the row, and other structures in more complex tables. This is aninjective relation: each combination of the values of the headers row (row 0, for lack of a better term) and the headers column (column 0 for lack of a better term) is related to a unique cell inthe table:
The first column often presents information dimension description by which the rest of the table is navigated. This column is called "stub column". Tables may contain three or multiple dimensions and can be classified by the number of dimensions. Multi-dimensional tables may have super-rows - rows that describe additional dimensions for the rows that are presented below that row and are usually grouped in a tree-like structure. This structure is typically visually presented with an appropriate number of white spaces in front of each stub's label.[8]
In literature tables often present numerical values, cumulative statistics, categorical values, and at times parallel descriptions in form of text.[9] They can condense large amount of information to a limited space and therefore they are popular in scientific literature in many fields of study.
As a communication tool, a table allows a form ofgeneralization of information from an unlimited number of different social or scientific contexts. It provides a familiar way to convey information that might otherwise not be obvious or readily understood.
For example, in the following diagram, two alternate representations of the same information are presented side by side. On the left is the NFPA 704 standard "fire diamond" with example values indicated and on the right is a simple table displaying the same values, along with additional information. Both representations convey essentially the same information, but the tabular representation is arguably more comprehensible to someone who is not familiar with the NFPA 704 standard. The tabular representation may not, however, be ideal for every circumstance (for example because of space limitations, or safety reasons).
| Standard Representation | Tabular Representation | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
There are several specific situations in which tables are routinely used as a matter of custom or formal convention.
Modern software applications give users the ability to generate, format, and edit tables and tabular data for a wide variety of uses, for example:
Tables have uses in software development for both high-level specification and low-level implementation.Usage in software specification can encompass ad hoc inclusion of simpledecision tables in textual documents through to the use of tabular specification methodologies, examples of which include Software Cost Reduction[10] and Statestep.[11]Proponents of tabular techniques, among whomDavid Parnas is prominent, emphasize their understandability, as well as the quality and cost advantages of a format allowing systematic inspection,[12] while corresponding shortcomings experienced with a graphical notation were cited in motivating the development of at least two tabular approaches.[11][13]
At a programming level, software may be implemented using constructs generally represented or understood as tabular, whether to store data (perhaps tomemoize earlier results), for example, inarrays orhash tables, orcontrol tables determining the flow of program execution in response to various events or inputs.
Database systems often store data in structures called tables; in whichcolumns are data fields androws represent data records.
In medievalcounting houses, thetables were covered with a piece ofcheckered cloth, to count money.[14][15]Exchequer is an archaic term for the English institution which accounted for money owed to themonarch. Thus thecheckerboard tables of stacks of coins are a concrete realization of thisinformation.[citation needed]
Media related toTables (information) at Wikimedia Commons| International | |
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