SFIT-Fit a polynomial to a spectrum

Description:

Task to generate a spectrum by fitting a polynomial to an input spectrum. An orthogonal polynomial of specified order is fitted either to the spectrum or to its logarithm, and the result is used to generate a new spectrum.

Parameters:

SPECTRUM

Name of spectrum to be fitted.

ORDER

Order of fitted polynomial.

LOGS

Fit to logarithms of data.

OUTPUT

Name of resulting spectrum.

Source comments:

 S F I T

 Figaro function to generate a spectrum by fitting a polynomial
 to an input spectrum.  An orthogonal polynomial of specified
 order is fitted either to the spectrum or to its logarithm, and
 the result is used to generate a new spectrum.

 Command parameters -

 SPECTRUM    (Character) The name of the spectrum to be fitted.

 ORDER       (Numeric) The order to be used for the fit.

 OUTPUT      (Character) The name of the output file to
             be created.  If this is the same as the input
             spectrum, the data in the input spectrum will
             be modified.

 Command keywords -

 LOGS        Indicates that the logs of the pixel values
             of the input spectrum are to be fitted.

                                          KS / CIT 5th June 1983