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# The NLFIT data structure.
# Structure length
define LEN_NLSTRUCT 35
# Structure definition
define NL_TOL Memr[P2R($1+0)] # Tolerance for convergence
define NL_LAMBDA Memr[P2R($1+2)] # Damping factor
define NL_OLDSQ Memr[P2R($1+4)] # Sum resid. squared last iter.
define NL_SUMSQ Memr[P2R($1+6)] # Sum of residuals squared
define NL_REFSQ Memr[P2R($1+8)] # Reference sum of squares
define NL_SCATTER Memr[P2R($1+10)] # Additional scatter
define NL_FUNC Memi[$1+12] # Fitting function
define NL_DFUNC Memi[$1+13] # Derivative function
define NL_NPARAMS Memi[$1+14] # Number of parameters
define NL_NFPARAMS Memi[$1+15] # Number of fitted parameters
define NL_ITMAX Memi[$1+16] # Max number of iterations
define NL_ITER Memi[$1+17] # Iteration counter
define NL_NPTS Memi[$1+18] # Number of points in fit
define NL_PARAM Memi[$1+19] # Pointer to parameter vector
define NL_OPARAM Memi[$1+20] # Pointer to orignal parameter vector
define NL_DPARAM Memi[$1+21] # Pointer to parameter change vector
define NL_DELPARAM Memi[$1+22] # Pointer to delta param vector
define NL_PLIST Memi[$1+23] # Pointer to parameter list
define NL_ALPHA Memi[$1+24] # Pointer to alpha matrix
define NL_COVAR Memi[$1+25] # Pointer to covariance matrix
define NL_BETA Memi[$1+26] # Pointer to beta matrix
define NL_TRY Memi[$1+27] # Pointer to trial vector
define NL_DERIV Memi[$1+28] # Pointer to derivatives
define NL_CHOFAC Memi[$1+29] # Pointer to Cholesky factorization
# next free location ($1 + 30)
# Access to buffers
define PLIST Memi[$1] # Parameter list
define OPARAM Memr[$1] # Original parameter vector
define PARAM Memr[$1] # Parameter vector
define DPARAM Memr[$1] # Parameter change vector
define ALPHA Memr[$1] # Alpha matrix
define BETA Memr[$1] # Beta matrix
define TRY Memr[$1] # Trial vector
define DERIV Memr[$1] # Derivatives
define CHOFAC Memr[$1] # Cholesky factorization
define COVAR Memr[$1] # Covariance matrix
# Defined constants alter for tricky problems
define LAMBDAMAX 1000.0
define MINITER 3
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