pspm_update_channeltype.m

function [channeltype_new] = pspm_update_channeltype (channeltype_og, keyword)
% ● Description
%   pspm_update_channeltype update the keywords of channel type
% ● Arguments
%   channeltype_og:  [string] the name of the original channel type
%          keyword:  the keyword to update to
%                    accepted values, 'c', 'pp', or {'c','pp'}
%                    'c': update the lateral keyword 'l' or 'r' to 'c'
%                    'pp': update the channel type to be preprocessed
%                    {'c','pp'}: update the channel type to be both bilateral
%                    and preprocessed.
% ● Output
%   channeltype_new: the new channel type with the updated keyword
% ● History
%   Introduced in PsPM 6.0.
%   Written in 2022 by Teddy Chao (UCL)

%% Initialise
global settings
if isempty(settings)
  pspm_init;
end
sts = -1;
channeltype_new = channeltype_og;
channeltype_og_struct = split(channeltype_og, '_');
channeltype_new_struct = split(channeltype_new, '_');
switch class(keyword)
  case 'char'
    switch keyword
      case settings.lateral.char.c
        loc = strcmp(channeltype_og_struct, settings.lateral.char.l) + strcmp(channeltype_og_struct,settings.lateral.char.r);
        channeltype_new_struct{logical(loc)} = settings.lateral.char.c;
      case 'pp'
        if ~strcmp(channeltype_og_struct,'pp')
          channeltype_new_struct = {channeltype_og_struct{1}, 'pp', channeltype_og_struct{2:end}};
        end
    end
  otherwise
    % if keyword is {'c','pp'}
    if isempty(setdiff(keyword, {settings.lateral.char.c,'pp'})) || isempty(setdiff(keyword, {'pp',settings.lateral.char.c}))
      loc = strcmp(channeltype_og_struct,settings.lateral.char.l) + strcmp(channeltype_og_struct,settings.lateral.char.r);
      channeltype_new_struct{logical(loc)} = settings.lateral.char.c;
      if ~strcmp(channeltype_og_struct,'pp')
        channeltype_new_struct = {channeltype_new_struct{1}, 'pp', channeltype_new_struct{2:end}};
      end
    end
end
channeltype_new = join(channeltype_new_struct,'_');
channeltype_new = channeltype_new{1};
return