v0.1.9

New datasets (7 added, 55 total)

Seven new interval-valued benchmark datasets from recent SDA papers (2020-2025):

• freshwater_fish.int — 12 freshwater fish species, 13 heavy metal bioaccumulation variables, 4 feeding classes
• fungi.int — 55 fungi specimens, 5 morphological variables, 3 genera (Amanita/Agaricus/Boletus)
• iris.int — 30 interval observations of Fisher's iris data, 4 sepal/petal variables, 3 species
• water_flow.int — 316 water flow sensor readings, 47 interval features, 2 classes
• wine.int — 33 wine samples, 9 chemical/physical property variables, 2 classes
• car_models.int — 33 Italian car models, 8 specification variables, 4 categories
• hdi_gender.int — 183 countries, 2 World Bank gender indicator intervals, ordinal HDI classification

Sources

• Andrade, N. A. et al. (2025). Kernel clustering with automatic variable weighting for interval data. Neurocomputing, 617, 128954.
• Alcacer, A. et al. (2023). Ordinal classification for interval-valued data. Expert Systems with Applications, 238, 121825.

Verification

• R CMD check: 0 errors, 0 warnings, 0 notes
• All 517 existing tests pass