Coal: Coal liquefaction data
In NRAIA: Data sets from "Nonlinear Regression Analysis and Its Applications"

The Coal data frame has 23 rows and 20 columns of data on a coal liquefaction process.

This data frame contains the following columns:

Time: the time of the observation, measured from the beginning of the run (min).
temp: the temperature of the run (K).
pressure: the pressure at which the run was performed (MPa).
fe2o3: iron oxide? (Fe2 O3) concentration in the run (wt% maf).
tr: transfer rate of the feed (wt% maf).
x1: inlet composition of unconverted coal (wt %).
x2: inlet composition of thermal residuals (wt %).
x3: inlet composition of C4-822K (wt %).
x4: inlet composition of C1-C3 gases (wt %).
x5: inlet composition of byproduct gases (wt %).
x6: inlet composition of water (wt %).
x7: inlet composition of hydrogen (wt %).
x8: inlet composition of Coal (wt %).
y1: outlet composition of unconverted coal (wt %).
y2: outlet composition of thermal residuals (wt %).
y3: outlet composition of C4-822K (wt %).
y4: outlet composition of C1-C3 gases (wt %).
y5: outlet composition of byproduct gases (wt %).
y6: outlet composition of water (wt %).
y7: outlet composition of hydrogen (wt %).

Bates and Watts (1998), Nonlinear Regression Analysis and Its Applications, Wiley (Appendix A4.7).

Originally from Lythgoe (1986), M.Sc. Thesis, Queen's University at Kingston.

str(Coal)
x8s <- with(Coal, equal.count(x8))
xyplot( y1 ~ x1 | x8s * Time, Coal, type = c("g","p"))
xyplot( y2 ~ x2 | x8s * Time, Coal, type = c("g","p"))
xyplot( y3 ~ x3 | x8s * Time, Coal, type = c("g","p"))
xyplot( y4 ~ x4 | x8s * Time, Coal, type = c("g","p"))
xyplot( y5 ~ x5 | x8s * Time, Coal, type = c("g","p"))
xyplot( y6 ~ x6 | x8s * Time, Coal, type = c("g","p"))
xyplot( y7 ~ x7 | x8s * Time, Coal, type = c("g","p"))