NNLS_MF function

Performs the non-negative matrix factorisation for given phytoplankton pigments and pigment ratios, to attain an estimate of phytoplankton class abundances.

NNLS_MF(Fn, S, cm = NULL)

Arguments

• Fn: Pigment to Chl a matrix
• S: Sample data matrix – a matrix of pigment samples
• cm: Weights for each column

Returns

A list containing

1. The F matrix (pigment: Chl a) ratios
2. The root mean square error (RMSE)
3. The C matrix (class abundances for each group)

Examples

MC <- Matrix_checks(Sm,Fm)
Snew <- MC$Snew
Fnew <- MC$Fnew
cm <- Bounded_weights(Snew, weight.upper.bound = 30)
NNLS_MF(Fnew, Snew, cm)