getCV(x)

Compute Coefficient of Variation (CV)

call:

CV = getCV(x)


compute the coefficient of variation (C.V.) of the input vector x.
The C.V. is defined as std(x)/mean(x), and as such is a measure of
the relative variability. The function ignores NaNs.

INPUT

x : input vector

OUTPUT

CV : coefficient of variation (a scalar)