| portland {india} | R Documentation |
Portland cement dataset
Description
This dataset comes from an experimental investigation of the heat evolved during the setting and hardening of Portland cements of varied composition and the dependence of this heat on the percentages of four compounds in the clinkers from which the cement was produced.
Usage
data(portland)Format
A data frame with 13 observations on the following 5 variables.
- y
The heat evolved after 180 days of curing, measured in calories per gram of cement.
- x1
Tricalcium aluminate.
- x2
Tricalcium silicate.
- x3
Tetracalcium aluminoferrite.
- x4
-
\beta-dicalcium silicate.
Source
Kaciranlar, S., Sakallioglu, S., Akdeniz, F., Styan, G.P.H., Werner, H.J. (1999). A new biased estimator in linear regression and a detailed analysis of the widely-analysed dataset on Portland cement. Sankhya, Series B 61, 443-459.