Clipper

log F^{2} scaling target More...
#include <resol_targetfn.h>
Public Member Functions  
TargetFn_scaleLogF1F2 (const HKL_data< T1 > &hkl_data1_, const HKL_data< T2 > &hkl_data2_)  
constructor: takes the datalist against which to calc target  
Rderiv  rderiv (const HKL_info::HKL_reference_index &ih, const ftype &fh) const 
return the value and derivatives of the target function  
FNtype  type () const 
the type of the function: optionally used to improve convergence 
log F^{2} scaling target
This class implements the target function for calculating the scale factor to scale the weighted log of one set of F's to another. The resulting scale is the square of the factor that scales the first set of data to match the second. The log scaling target is used in conjunction with the logGaussian basis functions for a fast and robust approximation to iso/aniso Gaussian scaling.