Hypericum HPLC Three-Way Data

HPLC-PDA profiles of commercial St. John's wort (Hypericum perforatum) preparations. The MATLAB file contains Dataset Object X plus class, country, rtaxis, and UVaxis variables. X.data has shape 89 x 97 x 549, corresponding to observation x UV wavelength x retention-time variable; UVaxis spans 260-548 nm and rtaxis spans 12.0-23.691 min. Numeric arrays contain finite values with no NaN or Inf values. The source README explicitly asks users to cite the 2008 Journal of Chemometrics exploratory clustering paper by Acar, Bro, and Schmidt.