Calibsel: Difference between revisions
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===Purpose=== | ===Purpose=== | ||
Stepwise variable selection (user contributed). | Stepwise variable selection (user contributed). | ||
===Synopsis=== | ===Synopsis=== | ||
:channel = calibsel(x,y,alpha,flag) | :channel = calibsel(x,y,alpha,flag) | ||
===Description=== | ===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). | 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. | |||
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). | |||
===See Also=== | ===See Also=== | ||
[[fullsearch]], [[gaselctr]], [[genalg]] | [[fullsearch]], [[gaselctr]], [[genalg]] | ||
Latest revision as of 13:25, 25 September 2008
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).