(redirected from Logit function)


The logarithm of the ratio of frequencies of two different categoric and mutually exclusive outcomes such as healthy and sick.
Farlex Partner Medical Dictionary © Farlex 2012
Mentioned in ?
References in periodicals archive ?
The logit function is the canonical link for mean estimation leading to log-odd predicting variable parameter estimates, exponentiation of these parameter estimates yield odds ratios.
Logit function is used to predict the travel choice distribution in the model.
In order to interpret the logit function, we calculated the marginal effects and the result of the score function, which was then validated by calculating the likelihood of PD.
Therefore, four combinations are selected to perform the multivariate analysis with logit function. Table 4 lists the combinations of four models.
We found a significant favourability model when analysing the distribution of the red-eared slider over the Mediterranean pond turtle range, the F-Trachemys-Encroachment model (Hosmer and Lemeshow: chi-square = 8.961, df = 8, and P = 0.346), with the following logit function:
The difference stands in the fact that the logit function takes absolute values larger than the probit, as can be noted looking at Figure 1.
* The second stage is a nested logit function used to estimate the market share among modal options: air, auto, bus, and rail (Chu and Chen, 1995; ICF Kaiser Engineers, 1993; KPMG Peat Marwick et al., 1993).
In the context of generalised hierarchical linear models this type of transformation is termed logit function. Thus, the logit is a linking function that establishes a relationship between the untransformed dependent variable [Y.sub.ij] (in our case, the score obtained by subject i on item j) and the transformed variable [[eta].sub.ij], ensuring that the predictions are located within a given interval of values.
This was done by substituting the average values of the variables into the Logit function and calculating the probabilities from the estimated value of the Logit function so obtained.
One of the widely used formulae accounting for mode choice is the logit function. In this paper, we use the logit formula as the mode split function based on generalized travel cost that gives more generality and complexity to the problem.
where Z is either prepayment or default on (and thus exit from) a subprime mortgage loan within 24 months of origination; [PHI](x) = 1/(1 + exp(-x)) is the logit function; x = [beta]'X; X is the vector of explanatory variables; and [beta] is the vector of regression coefficients.
22 Logit function for FuncW 1/h window 23 Probability for Pw 1/h window open 24 Random number Rn 1/h between 0 and 1 25 Window opening Weff 1/h effectiveness 26 Window status (0 = Sw 1/h closed, 1= open) 27 If 5[degrees]C 1/h hotter outside: close window?