2.4.
Statistical
analysis
Matlab
(R2009b,
Mathworks,
Natick,
MA,
USA)
has
been
used
to compute
the
?f
values
of
the
experiments
and
to run
statistical
analysis.
A preliminary
principal
component
analysis
(PCA)
was
carried
out
to verify
the
presence
of
outliers.
Hereafter
a multivariate
PLS-DA
analysis
was
made
in order
to discriminate
the
acceptable
and
the
off-flavour
samples
and
have
a robust
iden-
tification
of
the
classes.