SIGMA_POS_NEG property
read / write
Returns sigma of matrix
by evaluating a 16x16 square at the top
left of the spectrum (outside nmr diagonal)
posneg
is one of SIGMA_POS_ONLY, SIGMA_NEG_ONLY, SIGMA_POS_NEG.
It defines whether only positive, negative or all numbers in the region
should contribute to sigma.
Implementation
static int SIGMA_POS_ONLY = 0, SIGMA_NEG_ONLY = 1, SIGMA_POS_NEG = 2