new feature: Best subset selection (bss) with target-oriented validation as (very slow but very reliable) alternative to ffs
minor adaptations: verbose option included, improved examples for ffs
bugfix: minor adaptations done for usage with plsr
new feature: Introduction to CAST is included as a vignette.
bugfix: minor error fixed in using user defined metrics for model selection.
ffs with option withinSE=TRUE did not choose a model as "best model" if it was within the SE of a model that was trained in an earlier run but had the same number of variables. This bug is fixed and if withinSE=TRUE ffs now only compares the performance to models that use less variables (e.g. if a model using 5 variables is better than a model using 4 variables but still in the SE of the 4-variable model, then the 4-variable model is rated as the better model).
plot_ffs plots the results of ffs to visualize how the performance changes according to model run and the number of variables being used.
Initial public version on CRAN
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