code: def cmd_fft(args):
      '''display fft from log'''
      from MAVProxy.modules.lib import mav_fft
      if len(args) > 0:
          condition = args[0]
      else:
          condition = None
      child = multiproc.Process(target=mav_fft.mavfft_display, args=[mestate.filename,condition])
      child.start(f cmd_fft(args):
      '''display fft from log'''
      from MAVProxy.modules.lib import mav_fft
      if len(args) > 0:
          condition = args[0]
      else:
          condition = None
      child = multiproc.Process(target=mav_fft.mavfft_display, args=[mestate.filename,condition])
      child.start()
docs: display fft from log