Functions that estimate sample (taxonomic) composition from
biomarker data
bce1 estimates probability distributions of a sample composition
based on an input ratio matrix, A, containing
biomarker ratios in (field) samples, and an input data matrix,
B, containing the biomarker ratios for several taxonomic groups
tlsce estimates the total least squares solution
This version differs from the previous version <2 in that a different
MCMC method is used that shows better convergence properties and
has a more sound underlying statistical model.