Computational Statistics: Volume 2: Proceedings of the 10th by Peter J. Huber (auth.), Yadolah Dodge, Joe Whittaker (eds.)

By Peter J. Huber (auth.), Yadolah Dodge, Joe Whittaker (eds.)

The papers assembled during this e-book have been offered on the biannual symposium of Inter­ nationwide organization for Statistical Computing in Neuchcitel, Switzerland, in August of 1992. This congress marked the 10th such assembly from its inception in 1974 at Vienna and maintained the culture of offering a discussion board for the open dialogue of growth made in computing device orientated records and the dissemination of recent principles through the statistical group. It used to be pleasing to work out how good the teams of theoretical statisti­ cians, software program builders and utilized learn staff have been represented, whose blending is an occasion made uniquely attainable via this symposium. whereas protecting traditions convinced new good points were brought at this con­ ference: there have been a bigger variety of invited audio system; there has been extra advertisement sponsorship and exhibition house; and a bigger physique of lawsuits were released. The constitution of the court cases follows a regular structure: the papers were grouped jointly in keeping with a coarse material category, and inside subject keep on with an approximate aphabetical order. The papers are released in volumes ac­ cording to the emphasis of the themes: quantity I provides a mild leaning in the direction of facts and modelling, whereas quantity II is focussed extra on computation; yet this is often definitely just a crude contrast and the volumes need to be regarded as the results of a unmarried en terprise.

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Extra info for Computational Statistics: Volume 2: Proceedings of the 10th Symposium on Computational Statistics, COMPSTAT, Neuchâtel, Switzerland, August 1992

Example text

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In this procedure, first a random partition of observations into 2 groups (GROUPS=2 on line 26) is selected. Thereafter the procedure tries to move observations from a group to another and if the criterion value is improved, the observation is really moved. This practice will be continued until no single move improves the criterion value. Since the result depends on the initial random partition, it is good to repeat the procedure several times. In this case, 10 different random starts have been taken (TRIALS=lO) and two different solutions (Gl,G2) are obtained as seen on lines 33-34.

This was implemented by designing a specific language for the kind of knowledge we need, this language being represented with the system's working memory syntax. A general statistics-based problem solver implemented as a set of rules was designed for interpreting and controlling the domain knowledge. Facts are easy to add or modify, and they can be automatically checked for consistency. With the previous definitions, it is possible to use decision trees where nodes are methods (generic tasks) and leaves are module (specific tasks).

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