Note that this reference documentation is identical to the help that is displayed in MATLAB when you type ā€œhelp ft_plot_topo3dā€.

  FT_PLOT_TOPO3D makes a 3-D topographic representation of the electric
  potential or field at the sensor locations
 
  Use as
    ft_plot_topo3d(pos, val, ...);
  where the channel positions are given as a Nx3 matrix and the values are
  given as Nx1 vector.
 
  Optional input arguments should be specified in key-value pairs and can include
    'contourstyle' = string, 'none', 'black', 'color' (default = 'none')
    'isolines'     = vector with values at which to draw isocontours, or 'auto' (default = 'auto')
    'facealpha'    = scalar, between 0 and 1 (default = 1)
    'refine'       = scalar, number of refinement steps for the triangulation, to get a smoother interpolation (default = 0)
 
  See also FT_PLOT_TOPO, FT_PLOT_SENS, FT_TOPOPLOTER, FT_TOPOPLOTTFR