code: def _fit_dipole_fixed(
      min_dist_to_inner_skull,
      B_orig,
      t,
      guess_rrs,
      guess_data,
      *,
      sensors,
      fwd_data,
      whitener,
      fmin_cobyla,
      ori,
      rank,
      rhoend,
  ):
      """Fit a data using a fixed position."""
      B = np.dot(whitener, B_orig)
      B2 = np.dot(B, B)
      if B2 == 0:
          warn("Zero field found for time %s" % t)
          return np.zeros(3), 0, np.zeros(3), 0, np.zeros(6)
      # Compute the dipole moment
      Q, gof, residual_noproj = _fit_Q(
          fwd_data=guess_data,
          whitener=whitener,
          B=B,
          B2=B2,
          B_orig=B_orig,
          sensors=sensors,
          rd=None,
          ori=ori,
      )[:3]
      if ori is None:
          amp = np.sqrt(np.dot(Q, Q))
          norm = 1.0 if amp == 0.0 else amp
          ori = Q / norm
      else:
          amp = np.dot(Q, ori)
      rd_final = guess_rrs[0]
      # This will be slow, and we don't use it anyway, so omit it for now:
      # conf = _fit_confidence(rd_final, Q, ori, whitener, fwd_data)
      conf = khi2 = nfree = None
      # No corresponding 'logger' message here because it should go *very* fast
      return rd_final, amp, ori, gof, conf, khi2, nfree, residual_noproj
  
imports: import functools
  import re
  from copy import deepcopy
  from functools import partial
  import numpy
  from scipy.linalg import eigh
  from scipy.optimize import fmin_cobyla
  from ._fiff.constants import FIFF
  from ._fiff.pick import pick_types
  from ._fiff.proj import _needs_eeg_average_ref_proj, make_projector
  from ._freesurfer import _get_aseg, head_to_mni, head_to_mri, read_freesurfer_lut
  from .bem import _bem_find_surface, _bem_surf_name, _fit_sphere
  from .cov import _ensure_cov, compute_whitener
  from .evoked import _aspect_rev, _read_evoked, _write_evokeds
  from .fixes import _safe_svd, pinvh
  from .forward._compute_forward import _compute_forwards_meeg, _prep_field_computation
  from .forward._make_forward import _get_trans, _prep_eeg_channels, _prep_meg_channels, _setup_bem
  from .parallel import parallel_func
  from .source_space._source_space import SourceSpaces, _make_volume_source_space
  from .surface import _compute_nearest, _points_outside_surface, transform_surface_to
  from .transforms import _coord_frame_name, _print_coord_trans, apply_trans
  from .utils import ExtendedTimeMixin, TimeMixin, _check_fname, _check_option, _get_blas_funcs, _pl, _repeated_svd, _svd_lwork, _time_mask, _validate_type, _verbose_safe_false, check_fname, copy_function_doc_to_method_doc, fill_doc, logger, verbose, warn
  from .viz import plot_dipole_amplitudes, plot_dipole_locations
  from .viz.evoked import _plot_evoked
label_desc: Use image node_id 18 for calling a global function with example usage: _fit_dipole_fixed(min_dist_to_inner_skull, B_orig, t, guess_rrs, guess_data) and returns: rd_final,  amp,  ori,  gof,  conf,  khi2,  nfree,  residual_noproj, np,  int,  np,  int,  np