Pqnorm
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Purpose
Probabilistic Quotient Normalization for rows of a matrix.
Synopsis
- [sx,beta,xref] = pqnorm(x)
- [sx,beta,xref] = pqnorm(x,xref)
Description
A robust normalization method similar to Multiplicative Scatter Correction but using the median as the target and a robust fitting of each row to the target. PQN is equivalent to performing a 1-norm on the rows of X, followed by a robust MSC (algorithm = median, see mscorr).
Inputs
- x = Matrix of data to normalize (double).
Optional Inputs
- xref = Reference spectrum to normalize to (used for applying previously calculated normalization target to new data).