| haldCement {doBy} | R Documentation |
Heat development in cement under hardening.
Description
Heat development in cement under hardening related to the chemical composition.
Usage
haldCement
Format
A data frame with 13 observations on the following 5 variables.
x1Percentage (weight) of
[3Ca0][Al2O3]x2Percentage (weight) of
[3Cao][SiO2]x3Percentage (weight) of
[4Ca0][Al2O3][Fe03]x4Percentage (weight) of
[2Cao][SiO2]yHeat development measured in calories per gram cement after 180 days
References
Anders Hald (1949); Statistiske Metoder; Akademisk Forlag (in Danish), page 509.
Examples
data(haldCement)
if( interactive() ){
pairs( haldCement )
}
m <- lm(y ~ x1 + x2 + x3 + x4, data=haldCement)
summary(m)
# Notice: The model explains practically all variation in data;
# yet none of the explanatory variables appear to be statistically
# significant.
[Package doBy version 4.6.22 Index]