Elasticity and viscosity error box plots aggregated by true values, the
top ten plots are results for the CNNs trained, validated and tested on data
from the same and different F/N datasets, whereas the bottom four were evaluated
using Fourier analysis (FT) for comparison. The letter designates what label was
used, elasticity (E) or viscosity (V); the first number specifies the F/N used
for training and validation, whereas the second number designates the F/N used
for testing.