Yeh (2006) describes an aggregated data set for experimental designs used to test the compressive strength of concrete mixtures. The data are used by Kuhn and Johnson (2013).
Yeh I (2006). "Analysis of Strength of Concrete Using Design of Experiments and Neural Networks." Journal of Materials in Civil Engineering, 18, 597-604.
Kuhn, M., Johnson, K. (2013) Applied Predictive Modeling, Springer.
a tibble
data(concrete)
str(concrete)
#> tibble [1,030 × 9] (S3: tbl_df/tbl/data.frame)
#> $ cement : num [1:1030] 540 540 332 332 199 ...
#> $ blast_furnace_slag : num [1:1030] 0 0 142 142 132 ...
#> $ fly_ash : num [1:1030] 0 0 0 0 0 0 0 0 0 0 ...
#> $ water : num [1:1030] 162 162 228 228 192 228 228 228 228 228 ...
#> $ superplasticizer : num [1:1030] 2.5 2.5 0 0 0 0 0 0 0 0 ...
#> $ coarse_aggregate : num [1:1030] 1040 1055 932 932 978 ...
#> $ fine_aggregate : num [1:1030] 676 676 594 594 826 ...
#> $ age : int [1:1030] 28 28 270 365 360 90 365 28 28 28 ...
#> $ compressive_strength: num [1:1030] 80 61.9 40.3 41 44.3 ...