Block.plsda explained variance

To the whole mixOmics team, thank you very much for this great package!
I run a multi.plsda with 7 blocks of variables. I have trouble interpreting the results on explained variance. Using results$prop_expl_var I get explained variance for each block of variables (in brackets is the number of variables), e.g.:

$Free amino acids (20)
comp1 comp2
0.7855537 0.1137907
$Protein bound amino acids (20)
comp1 comp2
0.986142133 0.005543229

the last output is:
$Y
comp1 comp2
0.1428571 0.1392905

Could you give me some advise on how to interpret it, please.

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