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- W2000709900 abstract "Several nonparametric regressors have been applied to modeling quantitative structure-activity relationship (QSAR) data. The simplest regressor, the Nadaraya-Watson, was assessed in a genuine multivariate setting. Other regressors, the local linear and the shifted Nadaraya-Watson, were implemented within additive models--a computationally more expedient approach, better suited for low-density designs. Performances were benchmarked against the nonlinear method of smoothing splines. A linear reference point was provided by multilinear regression (MLR). Variable selection was explored using systematic combinations of different variables and combinations of principal components. For the data set examined, 47 inhibitors of dopamine beta-hydroxylase, the additive nonparametric regressors have greater predictive accuracy (as measured by the mean absolute error of the predictions or the Pearson correlation in cross-validation trails) than MLR. The use of principal components did not improve the performance of the nonparametric regressors over use of the original descriptors, since the original descriptors are not strongly correlated. It remains to be seen if the nonparametric regressors can be successfully coupled with better variable selection and dimensionality reduction in the context of high-dimensional QSARs." @default.
- W2000709900 created "2016-06-24" @default.
- W2000709900 creator A5051687648 @default.
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- W2000709900 date "2000-03-01" @default.
- W2000709900 modified "2023-10-12" @default.
- W2000709900 title "Nonparametric Regression Applied to Quantitative Structure−Activity Relationships" @default.
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- W2000709900 doi "https://doi.org/10.1021/ci990082e" @default.
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