Hald


The following data relates to an engineering application that was interested in the effect of the cement composition on heat evolved during hardening (for more details, see Woods et al., 1932).

datasets

Conceived to calculate Bayes factors in linear models and then to provide a formal Bayesian answer to testing and variable selection problems. From a theoretical side, the emphasis in the package is placed on the prior distributions and BayesVarSel allows using a wide range of them: Jeffreys (1961); Zellner and Siow(1980)<DOI:10.1007/bf02888369>; Zellner and Siow(1984); Zellner (1986)<DOI:10.2307/2233941>; Fernandez et al. (2001)<DOI:10.1016/s0304-4076(00)00076-2>; Liang et al. (2008)<DOI:10.1198/016214507000001337>  and Bayarri et al. (2012)<DOI:10.1214/12-aos1013>. The interaction with the package is through a friendly interface that syntactically mimics the well-known lm() command of R. The resulting objects can be easily explored providing the user very valuable information (like marginal, joint and conditional inclusion probabilities of potential variables; the highest posterior probability model, HPM; the median probability model, MPM) about the structure of the true -data generating- model. Additionally, "BayesVarSel" incorporates abilities to handle problems with a large number of potential explanatory variables through parallel and heuristic versions of the main commands, Garcia-Donato and Martinez-Beneito (2013)<DOI:10.1080/01621459.2012.742443>.

Anabel Forte

BayesVarSel

Bayes Factors, Model Choice and Variable Selection in Linear
Models

Hald function

A data frame with 13 observations on the following 5 variables.
  <dl>
    <dt><code>y</code></dt><dd>Heat evolved per gram of cement (in calories)</dd> <dt><code>x1</code></dt><dd>Amount of tricalcium aluminate</dd> <dt><code>x2</code></dt><dd>Amount of tricalcium silicate</dd> <dt><code>x3</code></dt><dd>Amount of tetracalcium alumino ferrite</dd> <dt><code>x4</code></dt><dd>Amount of dicalcium silicate</dd> </dl> 

Hald: Hald data

Description

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Examples