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data(ethanol)

Data frame with NOx, E and C variables.

NOx exhaust emissions from a single cylinder engine. Two predictor variables are E (the engine's equivalence ratio) and C (Compression ratio).

Brinkman (1981). Also studied extensively by Cleveland (1993).

Brinkman, N. D. (1981). Ethanol fuel - a single-cylinder engine study of efficiency and exhaust emissions. SAE transactions 90, 1414-1424.

Cleveland, W. S. (1993). Visualizing data. Hobart Press, Summit, NJ.

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