Least squares model fitting to fuzzy vector data
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Fuzzy Sets and Systems
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A least-squares approach to fuzzy linear regression analysis
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Fuzzy Sets and Systems
A fuzzy seasonal ARIMA model for forecasting
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Fuzzy Sets and Systems - Information processing
An Adaptive Fuzzy Regression Model for the Prediction of Dichotomous Response Variables
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Fuzzy Sets and Systems
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To model fuzzy binary observations, a new model named ''Fuzzy Logistic Regression'' is proposed and discussed in this study. In fact, due to the vague nature of binary observations, no probability distribution can be considered for these data. Therefore, the ordinary logistic regression may not be appropriate. This study attempts to construct a fuzzy model based on possibility of success. These possibilities are defined by some linguistic terms such as ..., low, medium, high.... Then, by use of the Extension principle, the logarithm transformation of ''possibilistic odds'' is modeled based on a set of crisp explanatory variables observations. Also, to estimate parameters in the proposed model, the least squares method in fuzzy linear regression is used. For evaluating the model, a criterion named the ''capability index'' is calculated. At the end, because of widespread applications of logistic regression in clinical studies and also, the abundance of vague observations in clinical diagnosis, the suspected cases to Systematic Lupus Erythematosus (SLE) disease is modeled based on some significant risk factors to detect the application of the model. The results showed that the proposed model could be a rational substituted model of an ordinary one in modeling the clinical vague status.