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SwRI can revise these Terms at any time * without notice by updating this posting. * * Trademarks * * The SwRI logo is a trademark of SwRI in the United States and other countries. * */ #ident "@(#) least_theta.c 1.17 05/08/19 SwRI" #include "libtrec_idfs.h" #include "libIDFSFill.h" /***************************************************************************** * * * IR_LEAST_FIT_THETA SUBROUTINE * * * * DESCRIPTION * * This routine is called in order to perform a least square's fit on the * * theta data matrix. This routine will process all units, one unit at a * * time. * * * * INPUT VARIABLES * * SDDAS_SHORT order the order of the fit (1, 2, 3, etc) * * SDDAS_LONG need_filled number of filled bins needed to perform the * * calculations to determine the missing bins * * SDDAS_FLOAT tension the weighting of the data * * * * USAGE * * ir_least_fit_theta (order, need_filled, tension) * * * * NECESSARY SUBPROGRAMS * * IDFSFill_two_d_ncyc () performs a 2-D least square's fit for non- * * cyclic data * * * * EXTERNAL VARIABLES * * struct general_info structure that holds information concerning * * ginfo the experiment that is being processed * * * * INTERNAL VARIABLES * * struct experiment_info a pointer to the structure that holds * * *ex specific experiment information * * struct collapse_data pointer to the collapse_data structure * * *cptr being processed * * struct bin_info *bptr a pointer to the structure holding sweep * * binning information * * reg SDDAS_FLOAT *dptr pointer to the data array * * register SDDAS_LONG step looping variable to process all bins * * register SDDAS_SHORT unit looping variable for data levels (units) * * reg SDDAS_CHAR *bin_stat pointer to the bin status array * * SDDAS_FLOAT *theta_data pointer to correct theta bins * * SDDAS_LONG offset_unit offset to get to the beginning of the data * * matrix for the data level being processed * * SDDAS_LONG row, col the current row/column being processed * * SDDAS_LONG num_steps the number of sweep bins * * SDDAS_LONG num_theta the number of theta bins * * SDDAS_LONG all_elements the number of elements in the data block * * * * SUBSYSTEM * * Display Level * * * ****************************************************************************/ void ir_least_fit_theta (SDDAS_SHORT order, SDDAS_LONG need_filled, SDDAS_FLOAT tension) { extern struct general_info ginfo; struct experiment_info *ex; struct collapse_data *cptr; struct bin_info *bptr; register SDDAS_FLOAT *dptr; register SDDAS_LONG step; register SDDAS_SHORT unit; register SDDAS_CHAR *bin_stat; SDDAS_FLOAT *theta_data; SDDAS_LONG offset_unit, row, col, num_steps, num_theta, all_elements; /************************************************************************/ /* Initialize pointers to the beginning of the phi matrix. */ /************************************************************************/ ex = ginfo.expt; bptr = ex->bin_ptr; cptr = ex->collapse_ptr; num_theta = (cptr->theta_bins <= 0) ? (SDDAS_LONG) ex->num_sensor : (SDDAS_LONG) cptr->theta_bins; num_steps = (SDDAS_LONG) bptr->num_bins; all_elements = num_theta * num_steps; /***********************************************************************/ /* Is there a "duplicate theta" issue? If so, data / bin status is */ /* separated per sensor, not per theta bin. */ /***********************************************************************/ if (cptr->theta_bins < 0) theta_data = cptr->data_3d_separate; else theta_data = cptr->data_3d_binned; /**********************************************************************/ /* Process one unit at a time. */ /**********************************************************************/ offset_unit = 0; for (unit = 0; unit < cptr->num_units; ++unit, offset_unit += all_elements) { dptr = theta_data + offset_unit; bin_stat = *(cptr->bin_stat_ptr + 0) + offset_unit; /*******************************************************************/ /* Process all steps of all theta bins. Always send in the top */ /* left-hand corner of the unit group to the ir_two_d modules. */ /* Theta always uses non-cyclic processing. */ /*******************************************************************/ for (step = 0; step < all_elements; ++step) { if (*(bin_stat + step) == 0) { row = step % num_steps; col = step / num_steps; *(dptr + step) = IDFSFill_two_d_ncyc (bin_stat, dptr, num_theta, num_steps, row, col, need_filled, tension, order); } } } }