Contains the task (`fuelsubset.task`

).
2 functional covariates and 1 scalar covariate.
You have to predict the heat value of some fuel based on the
ultraviolet radiation spectrum and infrared ray radiation and one scalar
column called h2o.

The features and grids are scaled in the same way as in FDboost::FDboost.

See Brockhaus, S., Scheipl, F., Hothorn, T., & Greven, S. (2015). The functional linear array model. Statistical Modelling, 15(3), 279–300.