# Variable

(redirected from spatial variable)
Also found in: Dictionary, Thesaurus, Medical, Encyclopedia.

## Variable

An element in a model. For example, in the model RS&Pt+1 = a + b Tbill t + et, where RS&Pt+1 is the return on the S&P in month t+1 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

Anything that does not have a set value. In basic algebra, a variable is often expressed as "x." Variables in economics and finance may be measures such as GDP, prices, or interest rates. Analysts use complicated equations to determine the value of some variables at the present time and even more complicated equations to predict their possible future values. See also: Regression.

## variable

Something, such as stock prices, earnings, dividend payments, interest rates, and gross domestic product, that has no fixed quantitative value. See also dependent variable, independent variable.
References in periodicals archive ?
A study of almost 5,000 single-family home sales in Auckland, New Zealand, controlled for a number of spatial variables including scope of view (wide, medium, or narrow) and distance from the coast.
QSC Methods for Spatial Variables. We firstly consider reducing the computational cost in spatial domain.
In this paper, we consider the KdV equation on a uniform mesh, the spatial variable at the nodes is [x.sub.i] = i x h for 0 [less than or equal to] [less than or equal to] i [less than or equal to] N and the functions and the derivatives are denoted by [u.sub.i], [u'.sub.i].
Recently, Markov chains were extended into a new spatial statistical approach, that is, the MCRF approach, for simulating categorical spatial variables .
To date, some studies have been conducted on the exponential synchronization of PDSs, where spatial variables are one-dimensional and the networks have no time lag [26, 27].
When excluding municipalities, we create empty spaces in the spatial weight matrix, which will affect the coefficients of the spatial variables to some degree; not accounting for the missing municipalities' effects may bias the coefficient, making the potential spatial effects smaller.
The spatial factors consisted of nine spatial variables constructed from the xy coordinates of each plot site.
We also investigated the effect of 1) 3 water masses, the South Atlantic Central Water (SACW), Coastal Water (CW), and Mixed Water (M), and 2) a set of environmental and spatial variables on the SBB pelagic fish assemblages.
Explicit solution of (4), (5) can be obtained using the method of integral transforms  by all spatial variables (x,y,z) and not touching time argument t that is accepted as the main one.
We used a spatial eigenfunction approach (Thioulouse et al., 1995; Griffith and Peres-Neto, 2006) to generate spatial variables, through the Principal Coordinates of Neighbor Matrices technique (PCNM; Borcard and Legendre, 2002), with the aim of representing spatial structures generated by environmental autocorrelation and potential biotic processes, such as dispersal (Dray et al., 2006).
Goovaerts, "Second-phase sampling designs for non-stationary spatial variables," Geoderma, vol.

Site: Follow: Share:
Open / Close