Principal Component analysis.
A grid of 78000 models varying Bquad_i and the LOS, magnetic angles
Tipically lcıs are reproduced using only the first ~20-21 more significant PCs (zi) (instead of 32 phases)
The first 4 zis account for 85 % of the total variance!
z1 easy meaning
= mean value of the lc
Different def of ³distance² used in the PCıs space
BUT it is difficult to relate the PCs
to the physical variables Bquad, c, x
(non linear dependence.. Regression method does not work)