From: Non-destructive characterisation and classification of ceramic artefacts using pEDXRF and statistical pattern recognition
Original feature
y1
y2
Si
−0.31
−0.42
K
0.69
−0.18
Ca
−0.10
−0.20
Ti
−0.35
0.07
Mn
0.04
0.37
Fe
0.01
Zn
−0.07
Rb
0.36
−0.002
Sr
0.08
Zr
−0.39
−0.78