Data and original code for: A generalized approach to characterise optical properties of natural objects

To understand the diversity of ways in which natural materials interact
with light, it is important to consider how their reflectance changes with
the angle of illumination or viewing and to consider wavelengths beyond
the visible. We chose a set of existing measurements and
parameters that are generalisable to any wavelength range and spectral
shape and we highlight which subsets of measures are relevant to different
biological questions. As a case study, we applied these measures to 30
species of Christmas beetles. Here we provide the raw spectral data of
angle integrated and angle-dependent reflection by the beetle elytra. We
also provide the original code used for our analysis and figures.