“variable”的概念、定义、翻译、参考文献-科学参考

variable

Mathematics

A variable, often denoted by a single letter which may represent any element of a given set. When variables x and y are related by a function, so y = f(x), then x is referred to as the independent variable and y as the dependent variable.

Statistics

The characteristic measured or observed when an experiment is carried out or an observation is made. Variables may be non-numerical (see categorical variable) or numerical. Since a non-numerical observation can always be coded numerically, a variable is usually taken to be numerical. Statistics is concerned with random variables and with variables whose measurement may involve random errors.

Chemical Engineering

A mathematical expression representing either a general point taken from a specific set of values, or as a name for an unknown point to be determined from within a specified set of possible values. Dependent variables have values that are influenced by changes in other values, whereas independent variables are not influenced.

Computer

1. A unit of storage that can be modified during program execution, usually by assignment or read operations. A variable is generally denoted by an identifier or by a name.
2. The name that denotes a modifiable unit of storage.
3. See parameter.
4. (in logic) a name that can stand for any of a possibly infinite set of values.

Biology

In statistics and research, any characteristic relating to an individual or group that can take a number of different values. Categorical or qualitative variables are descriptive characteristics, such as sex or species; quantitative variables relate to a numerical scale and are subdivided into discrete variables, found only at fixed points (e.g. number of offspring), and continuous variables, found at any point on a scale (e.g. weight). See also confounding; correlation.

Economics

A quantity which is liable to change. Economic variables may measure prices, interest rates, income levels, quantities of goods, etc. An exogenous variable is one where the changes originate from causes outside the scope of a given model; an endogenous variable is determined within the model. See also random variable.

单词	variable
释义	variable Mathematics A variable, often denoted by a single letter which may represent any element of a given set. When variables x and y are related by a function, so y = f(x), then x is referred to as the independent variable and y as the dependent variable. Statistics The characteristic measured or observed when an experiment is carried out or an observation is made. Variables may be non-numerical (see categorical variable) or numerical. Since a non-numerical observation can always be coded numerically, a variable is usually taken to be numerical. Statistics is concerned with random variables and with variables whose measurement may involve random errors. Chemical Engineering A mathematical expression representing either a general point taken from a specific set of values, or as a name for an unknown point to be determined from within a specified set of possible values. Dependent variables have values that are influenced by changes in other values, whereas independent variables are not influenced. Computer 1. A unit of storage that can be modified during program execution, usually by assignment or read operations. A variable is generally denoted by an identifier or by a name. 2. The name that denotes a modifiable unit of storage. 3. See parameter. 4. (in logic) a name that can stand for any of a possibly infinite set of values. Biology In statistics and research, any characteristic relating to an individual or group that can take a number of different values. Categorical or qualitative variables are descriptive characteristics, such as sex or species; quantitative variables relate to a numerical scale and are subdivided into discrete variables, found only at fixed points (e.g. number of offspring), and continuous variables, found at any point on a scale (e.g. weight). See also confounding; correlation. Economics A quantity which is liable to change. Economic variables may measure prices, interest rates, income levels, quantities of goods, etc. An exogenous variable is one where the changes originate from causes outside the scope of a given model; an endogenous variable is determined within the model. See also random variable.
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