code: def save_plot():
      # Plot using global variables
      plot_localizer()
  
      def vx2mm(pts):
          return pts - iso_center
  
      plot_box(vx2mm(rot_box), label="EPI bounding box")
      plot_box(vx2mm(anat_box), "b-", label="Structural bounding box")
      labeled_point(vx2mm(epi_center), "ro", "EPI FOV center")
      labeled_point(vx2mm(anat_center), "bo", "Structural FOV center")
      labeled_point(vx2mm(iso_center), "g^", "Magnet isocenter")
      plt.axis("tight")
      plt.legend(loc="lower right")
      plt.title("Scanner localizer image")
      plt.savefig("localizer.png")
  
file_path: nibabel/doc/source/scripts/make_coord_examples.py
imports: import math
  import matplotlib.pyplot
  import nipy
  import nipy.algorithms.resample
  import nipy.core.api
  import numpy
  import numpy.linalg
  import nibabel.eulerangles
label_desc: Use image node_id 7 for calling a global function with example usage: save_plot() and returns: unknown