Calibsel
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Purpose
Stepwise variable selection (user contributed).
Synopsis
- channel = calibsel(x,y,alpha,flag)
Description
CALIBSEL performs the variable selection procedure described in Brown, P.J., Spiegelman, C.H., and Denham, M.C., "Chemometrics and spectral frequency selection", Phil. Trans. R. Soc. Land. A 337, 311-322, (1991). Inputs are the calibration spectra x and concentrations y, significance level for chi-square test alpha, and a variable flag that allows the user to modify how the routine iterates. The output channel is a vector of indices corresponding to selected channels/wavelengths in y.