By Robert A. Dunne

ISBN-10: 0470148144

ISBN-13: 9780470148143

ISBN-10: 0471741086

ISBN-13: 9780471741084

An available and updated therapy that includes the relationship among neural networks and statisticsA Statistical method of Neural Networks for trend attractiveness provides a statistical therapy of the Multilayer Perceptron (MLP), that is the main well-known of the neural community versions. This e-book goals to respond to questions that come up while statisticians are first faced with this sort of version, such as:How strong is the version to outliers?Could the version be made extra robust?Which issues can have a excessive leverage?What are sturdy beginning values for the appropriate algorithm?Thorough solutions to those questions and lots of extra are incorporated, in addition to labored examples and chosen difficulties for the reader. Discussions at the use of MLP versions with spatial and spectral facts also are integrated. additional remedy of hugely very important imperative points of the MLP are supplied, resembling the robustness of the version within the occasion of outlying or ordinary info; the impact and sensitivity curves of the MLP; why the MLP is a reasonably strong version; and adjustments to make the MLP extra strong. the writer additionally presents explanation of a number of misconceptions which are regularly occurring in latest neural community literature.Throughout the publication, the MLP version is prolonged in numerous instructions to teach statistical modeling method could make worthwhile contributions, and extra exploration for becoming MLP types is made attainable through the R and S-PLUS® codes which are on hand at the book's similar site. A Statistical method of Neural Networks for trend popularity effectively connects logistic regression and linear discriminant research, therefore making it a severe reference and self-study advisor for college kids and pros alike within the fields of arithmetic, facts, computing device technology, and electric engineering.

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**Additional info for A Statistical Approach to Neural Networks for Pattern Recognition (Wiley Series in Computational Statistics)**

**Example text**

Hence there is an optimal point beyond which adding more parameters is counterproductive. Unfortunately in practice estimating this point is difficult and computationally expensive. This is essentially the problem of overfitting and in many instances the best practical advice that can be offered is simply to limit the number of parameters in an arbitrary fashion. 5 (p. , 2001, Section 7 for a discussion of this). 5 BINARY VARIABLES A N D LOGISTIC REGRESSION Minimizing the sum of squares penalty function coincides with finding the maximum likelihood estimator for a random variable with a Gaussian distribution.

So the predicted values X ' B are of the form X * V . A f i U Z G - ' = X S V u C say, where C is a full-rank matrix5 and so spans the same space as the linear discriminants. However, while they span the same space, the regression coefficients do not give the linear discriminant classifier6 as the q f h column of B is BLql = N N q -lE,' M"q,] 4Hastie (1994) mentions specifically responding t o the challenge of neural networks in the area of flexible decision regions as a motivation in the development of flexible LDA.

2. We have designed this test example so that we need a non-linear decision region to achieve a zero misclassification error. 2, that is 2 input nodes, 3 hidden layer nodes and 2 output nodes. nn<-mlp(2,3,2,200,data,target) plot. lines plots the lines defined by the rows of 0. It is only usable when the input space is of 2-dimensional. mat sets up a matrix of output values for the MLP, suitable for the contour function to plot. 5,add=T) Note that the final decision boundary is a smooth curve. mat, which could be altered (although it will then require more time for the computation).

### A Statistical Approach to Neural Networks for Pattern Recognition (Wiley Series in Computational Statistics) by Robert A. Dunne

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