gsl_fit Data Structures

Here are the data structures with brief descriptions:

_data	The _data struct holds a data set to be fit
_fitf	The gsl_fit struct will be passed as void pointer to the fitting routines
_func	The _func struct holds pointers to the user-supplied functions
_meth	The _meth struct determines which fitting method to call
_para	The _para struct holds all of the paramters

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