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  2. Dependent and independent variables - Wikipedia

    en.wikipedia.org/wiki/Dependent_and_independent...

    A variable is considered dependent if it depends on an independent variable. Dependent variables are studied under the supposition or demand that they depend, by some law or rule (e.g., by a mathematical function), on the values of other variables. Independent variables, in turn, are not seen as depending on any other variable in the scope of ...

  3. Trace table - Wikipedia

    en.wikipedia.org/wiki/Trace_table

    The table usually takes the form of a multi-column, multi-row table; With each column showing a variable, and each row showing each number input into the algorithm and the subsequent values of the variables. Trace tables are typically used in schools and colleges when teaching students how to program.

  4. Exogenous and endogenous variables - Wikipedia

    en.wikipedia.org/wiki/Exogenous_and_endogenous...

    In an economic model, an exogenous variable is one whose measure is determined outside the model and is imposed on the model, and an exogenous change is a change in an exogenous variable. [1]: p. 8 [2]: p. 202 [3]: p. 8 In contrast, an endogenous variable is a variable whose measure is determined by the model. An endogenous change is a change ...

  5. Predetermined variables - Wikipedia

    en.wikipedia.org/wiki/Predetermined_variables

    If the shock affects current consumption, predeterminedness (defined now as lags only) provides potential instruments--lagged values of the variable. Predeterminedness, or sequential exogeneity, is commonly invoked in dynamic panel models. Predetermined variables can be shown as: E(u is |x it) =0 where s > t.

  6. Free variables and bound variables - Wikipedia

    en.wikipedia.org/wiki/Free_variables_and_bound...

    Note: we define a location in an expression as a leaf node in the syntax tree. Variable binding occurs when that location is below the node n. In the lambda calculus, x is a bound variable in the term M = λx. T and a free variable in the term T. We say x is bound in M and free in T. If T contains a subterm λx. U then x is rebound in this term.

  7. Ren'Py - Wikipedia

    en.wikipedia.org/wiki/Ren'Py

    The Ren'Py Visual Novel Engine (or RenPy for short) is a free software game engine which facilitates the creation of visual novels. Ren'Py is a portmanteau of ren'ai ( 恋愛 ) , the Japanese word for 'romantic love', a common element of games made using Ren'Py; and Python , the programming language that Ren'Py runs on.

  8. Conditional entropy - Wikipedia

    en.wikipedia.org/wiki/Conditional_entropy

    In information theory, the conditional entropy quantifies the amount of information needed to describe the outcome of a random variable given that the value of another random variable is known. Here, information is measured in shannons , nats , or hartleys .

  9. Errors-in-variables model - Wikipedia

    en.wikipedia.org/wiki/Errors-in-variables_model

    Linear errors-in-variables models were studied first, probably because linear models were so widely used and they are easier than non-linear ones. Unlike standard least squares regression (OLS), extending errors in variables regression (EiV) from the simple to the multivariable case is not straightforward, unless one treats all variables in the same way i.e. assume equal reliability.