FIT Sub-Menu Commands

CHANGE SCALE Change the typical parameter variation sizes

CLEAR MASK Eliminate all masked-off ``bad'' data points

CONSTRAIN Set constraints, change parameters values

COVARIANCE Output covariance matrix

DEFINE MASK Mask-off ``bad'' data prior to fitting

DISPLAY MASK Display masked-off data as a two level image

EXIT Exit fit sub-menu

INPUT PARAMETERS Initialisation of fit model

MASK STATISTICS Statistics of mask

MINIMISE Search for better fit by maximum descent method

MODEL Create fit model (in memory) from current parameter values

NORMALISATION Uni-directional flat-field normalisation

OUTPUT PARAMETERS Output fit parameters to a file

POWDER DIFFRACTION Fit beam centre and tilt to powder ring

QUIT Exit fit sub-menu

R/THETA RE-BINNING Radial/Angular (polar) re-binning of ROI

RADIAL PROFILE Calculate 1-D radial profile in memory

RESULTS View results of fitting

SET MASK COLOUR User choice of colour to draw masked pixels

SET UP Alter fit control parameters

SURFACE POLYNOMIAL Fit data using 2-D Chebyshev polynomial

THRESHOLD MASKING Mask elements depending on ROI data values

TILT/BEAM CENTRE Determine from a powder ring

TRANSFER MASK TO MEMORY Set masked elements to 1.0 in memory