Definition of Variable

Variable
Refers to the series used in a model. For example, in the model RS&Pt11 = a + b Tbillt + et, where RS&Pt11 is the return on the S&P in month t11 and Tbill is the Tbill return at month t, both RS&P and Tbill are 'variables' because they change through time, i.e. they are not constant.

Variable
able to change.

variable
<programming> A named memory location in which a program can store intermediate results and from which it can read it them. Each programming language has different rules about how variables can be named, typed, and used. Typically, a value is "assigned" to a variable in an assignment statement. The value is obtained by evaluating an expression and then stored in the variable. For example, the assignment
x = y + 1
means "add one to y and store the result in x". This may look like a mathematical equation but the mathematical equality is only true in the program until the value of x or y changes. Furthermore, statements like
x = x + 1
are common. This means "add one to x", which only makes sense as a state changing operation, not as a mathematical equality.
The simplest form of variable corresponds to a single-word of memory or a CPU register and an assignment to a load or store machine code operation.
A variable is usually defined to have a type, which never changes, and which defines the set of values the variable can hold. A type may specify a single ("atomic") value or a collection ("aggregate") of values of the same or different types. A common aggregate type is the array - a set of values, one of which can be selected by supplying a numerical index.
Languages may be untyped, weakly typed, strongly typed, or some combination. Object-oriented programming languages extend this to object types or classes.
A variable's scope is the region of the program source within which it represents a certain thing. Scoping rules are also highly language dependent but most serious languages support both local and global variables.
In a functional programming language, a variable's value never changes and change of state is handled as recursion over lists of values.
(2003-12-23)

variable
variable

A named storage location that can contain data that can be modified during program execution. Each variable has a name that uniquely identifies it within its scope. A data type can be specified or not. Variable names must begin with an alphabetic character, must be unique within the same scope, can't be longer than 255 characters, and can't contain an embedded period or type-declaration character.

Variable
A named container that holds values, either numeric or text.

variable
An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope.

Variable
(n.)
Those parts of the sea where a steady wind is not expected, especially the parts between the trade-wind belts.
  
(n.)
That which is variable; that which varies, or is subject to change.
  
(n.)
A shifting wind, or one that varies in force.
  
(n.)
A quantity which may increase or decrease; a quantity which admits of an infinite number of values in the same expression; a variable quantity; as, in the equation x2 - y2 = R2, x and y are variables.
  
(a.)
Liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable.
  
(a.)
Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
  

variable

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Noun
1. something that is likely to vary; something that is subject to variation; "the weather is one variable to be considered"
(hypernym) thing
2. a quantity that can assume any of a set of values
(synonym) variable quantity
(hypernym) quantity
(hyponym) argument
3. a star that varies noticeably in brightness
(synonym) variable star
(hypernym) star
(hyponym) Polaris, North Star, pole star, polar star, polestar
4. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity
(hypernym) symbol
(hyponym) placeholder

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Adjective
1. liable to or capable of change; "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
(antonym) invariable
(similar) changeable, uncertain, unsettled
(see-also) inconsistent
2. marked by diversity or difference; "the varying angles of roof slope"; "nature is infinitely variable"
(synonym) varying
(similar) varied
3. (used of a device) designed so that a property (as e.g. light) can be varied; "a variable capacitor"; "variable filters in front of the mercury xenon lights"
(similar) adaptable

variable

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variable
\va"ri*a*ble\ (?), a. [l. variabilis: cf. f. variable.]
1. having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity.
2. liable to vary; too susceptible of change; mutable; fickle; unsteady; inconstant; as, the affections of men are variable; passions are variable. lest that thy love prove likewise variable. his heart, i know, how variable and vain!
variable
exhaust (steam eng.), a blast pipe with an adjustable opening.
variable
quantity (math.), a variable.
variable
stars (astron.), fixed stars which vary in their brightness, usually in more or less uniform periods.

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  similar words(21) 

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 stochastic variable 
 variable velocity 
 variable-pitch propeller 
 variable quantity 
 variable star 
 variable stars 
 shell variable 
 variable exhaust 
 logic variable 
 variable resistor 
 random variable 
 metasyntactic variable 
 bound variable 
 instance variable 
 dependent variable 
 environment variable 
 volatile variable 
 generic type variable 
 free variable 
 independent variable 
 chance variable 

variable
Having a tendency to change.

variable
athróg f.

VARIABLE
(Statistics) A series of comparable observations or characteristics of a phenomenon taken as a single set of data; a listing of specific characteristics of a population or a number of observations taken over a specific period of time which may reasonably be expected to vary from observation to observation.

Variable (n.)
vuhnayek

VARIABLE.
Any characteristic or attribute that can be measured.

VAR
Variable, Variation

Variable
Some characteristic that varies among experimental units (subjects) or from time to time. A variable may be quantitative or categorical. A quantitative variable is either discrete (assigning meaningful numerical values to observations: number of children, dosage in mg) or continuous (height, weight). A categorical variable is either nominal (assigning observations to categories: gender, treatment, disease subtype, groups) or ordinal (ranked variables: low, median, high dosage). Conventionally, a random variable is shown by a capital letter, and the data values it takes by lower case letters.

Variable
a measurable quantity which at every instant has a definite numerical value. If there is any doubt whether a particular quantity may be admitted as a variable, use the criterion whether it can be represented by a pointer on a dial. Pressure, angle, electric potential, volume, velocity, mass, viscosity, population, national income per capita and time itself, to mention only a few, can all be specified numerically and recorded on dials. Eddington's statement on the subject is explicit: "The whole subject matter of exact science consists of pointer readings and similar indications. Whatever quantity we say we are 'observing', the actual procedure nearly always ends in reading the pointer of some kind of indicator on a graduated scale or its equivalent." (Ashby, 1960, p. l5)

VARIABLE
A characteristic that varies in value or magnitude along which an object, individual or group may be categorized, such as income or age.

Variable

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