fastR2 (version 0.2.0)

Concrete: Concrete Compressive Strength Data

Description

These data were collected by I-Cheng Yeh to determine how the compressive strength of concrete is related to its ingredients (cement, blast furnace slag, fly ash, water, superplasticizer, coarse aggregate, and fine aggregate) and age.

Format

Concrete is a data frame with the following variables.

• limestone percentage of limestone

• water water-cement ratio

• strength compressive strength (MPa) after 28 days

References

Appeared in Devore's "Probability and Statsistics for Engineers and the Sciences (6th ed). The variables have been renamed.

I-Cheng Yeh (1998), "Modeling of strength of high performance concrete using artificial neural networks," Cement and Concrete Research, Vol. 28, No. 12, pp. 1797-1808.

Examples

# NOT RUN {
data(ConcreteAll)
data(Concrete28)

# }