getPureVariables function

Identifies pure variables

The method identifies indices of pure variables using the SIMPLISMA algorithm.

getPureVariables(D, ncomp, purevars, offset)

Arguments

• D: matrix with the spectra
• ncomp: number of pure components
• purevars: user provided values gor pure variables (no calculation will be run in this case)
• offset: offset (between 0 and 1) for calculation of parameter alpha

Returns

The function returns a list with with following fields: - ncomp: number of pure components.

• purvars: vector with indices for pure variables.

• purityspec: matrix with purity values for each resolved components.

• purity: vector with purity values for resolved components.