**POLYPT** accepts the output cards from LSQFIT as input, for any order polynomial, plots the experimental points (xi, yi) and draws the curve of the polynomial, by calculating its value at 1/20th angstrom intervals from the coefficients.

**FLEXP**T accepts the output cards of LSQFIT, for 4th order only, and calculates the mid-point of the line joining the inflexion points of the curve, giving an estimate of the mean wavelength shift.

**MINIPT and MINIPS** accept cards from LSQFIT 4th and 6th order polynomial respectively. They find the minimum point of the curve by successive approximation, giving a different estimate of the wavelength shift.

**GAUSPT** accepts the output of GAUSSN and draws the fitted Gaussian shape. All exit on a blank card.