Table 1 A description of the columns in the data

350.14

Reflectance measured at the wavelength of

350.14 nm. A floating point number typically in the

range from 0 to 60.

350.41

Reflectance measured at the wavelength of 350.41 nm

⋮

⋮

649.98

Reflectance measured at the wavelength of 649.98 nm

Specimen

The ID of the animal measured (integer between 1

and 12).

Tissue

Which tissue type was measured (categorical

variable, possible values are Fat, Mucosa, Muscle,

Nerve, Skin, Cortical Bone, Salivary Gland,

Cancellous Bone)