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% function [SIGNALS, HEADER, EVENTS] = gdf_reader( FILENAME, OPTION, VALUE, ... )
%
% Load GDF files.
%
% Input Arguments:
%
% FILENAME: Full pathname of the file to load (including extension)
%
% Output Arguments:
%
% SIGNALS: Contains all signals (channels) stored in the GDF file.
% The output format (cell array, matrix) can be changed
% with the "MULTIRATESIGNALS" option.
%
% HEADER: Header Structure that contains all Meta-Information
%
% EVENTS: Event Structure
%
% OPTIONS: Options are provided as Option-Value pairs.
% "DATAFORMAT" possible values:
% "MATRIX" Signals are arranged in a matrix. To use this format with multirate
% data, "UPSAMPLEMODE" must be specified. This causes all signals to
% be upsampled to the highest sampling rate in the file.
% "SINGLE" (default) A cell array is returned, that contains each signal
% as a separate vector.
% "GROUP" All signals with the same sampling rates are grouped
% into matrices, which are returned in a cell array.
%
% "UPSAMPLEMODE" determines how upsampling of multirate data is performed
% when "DATAFORMAT" is set to "MATRIX".
% "NEAREST" Nearest Neighbor interpolation
% "LINEAR" Linear Interpolation
%
% "DATAORIENTATION" wether channels should be arranged in rows or columns
% "COL" (default) each signal is a column vector.
% "ROW" each signal is a row vector.
%
% "FORCEMODE3EVENTS" events are converted to mode 3.
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