Adaptation Methods

DirectStandardization	Direct Standardization (DS) is a transformer used for domain adaptation (calibration ) applications.
PiecewiseDirectStandardization	Piecewise Direct Standardization (PDS) is a transformer used for domain adaptation (calibration) applications.
SpectralSpaceTransform	Spectral Space Transform (SST) is a transformer used for domain adaptation (calibration) applications.
XAxisInterpolator	Interpolate every row of X onto a shared common_x_axis.
MetadataFunctionTransformer	Apply a callable that consumes feature data and routed metadata.

Validation

check_metadata_function

Validate a metadata function on representative data.

Predefined Functions

subtract_reference	Subtract a reference spectrum from every row of X.
divide_by_reference	Divide every row of X by a reference spectrum.
scale_by_factor	Multiply every row of X by a scalar or array factor.
add_offset	Add a baseline offset to every row of X.