added function which accepts matrix from matlab

detect_matlab.m

@@ -0,0 +1,73 @@
+function [ qrs, sqi ] = detect_matlab(data, header, fs, alg, opt)
+%[ qrs, sqi ] = detect_matlab(data, header, fs, alg, opt) detects QRS 
+%complexes in the provided data. The QRS detections and signal quality
+%estimates are ouput.
+
+% Dependencies:
+%
+%       1) This function requires the WFDB Toolbox for MATLAB and Octave.
+%          For information on how to install the toolbox, please see:
+%              http://www.physionet.org/physiotools/matlab/wfdb-app-matlab/
+%
+%       2) The Toolbox is supported only on 64-bit MATLAB 2013a and 2013b
+%          and on GNU Octave 3.6.4 and later, on Linux, Mac OS X, and
+%          Windows.
+
+%% CHECK INPUTS ARE VALID
+
+if nargin<3
+    error('Function requires at least 3 inputs.');
+end
+
+% check data types
+if isnumeric(data)==0
+    error('detect_matlab:invalidData',...
+        'Data must be an NxD matrix of N samples and D signals.');
+end
+if ischar(header) && size(data,2)==1
+    header = {header}; % convert to 1x1 cell array of strings
+elseif ~iscell(header)
+    error('detect_matlab:invalidHeader',...
+        'Header must be an 1xD cell array of strings.');
+end
+
+% check that data/header are consistent in size
+if size(data,2) ~= size(header,2)
+    error('detect_matlab:dataMismatch',...
+        'Each signal in DATA must have a corresponding element in HEADER, and vice versa.');
+end
+
+if isnumeric(fs)==0
+    error('detect_matlab:invalidSamplingFrequency',...
+        'Third input must be a scalar or vector of integers representing the sampling frequency.');
+end
+if numel(fs) == 1
+    fs = repmat(fs,1,size(data,2));
+end
+
+if nargin<4
+    alg = 'sqi';
+elseif ~ischar(alg)
+    error('detect:incorrectAlgorithm',...
+        'Switching algorithm should be a string: either ''sqi'' or ''regularity''.')
+elseif ~strcmpi(alg,'sqi') && ~strcmpi(alg,'regularity')
+    error('detect:incorrectAlgorithm',...
+        'Switching algorithm should be ''sqi'' or ''regularity''')
+end
+
+% if no options input, create empty structure
+% option settings are checked in the detect subfunctions
+if nargin<5
+    opt = struct();
+end
+
+%% run either SQI algorithm or regularity algorithm
+if strcmpi(alg,'regularity')
+    % run heart rate regularity based switching
+    [ qrs, sqi, qrs_comp, qrs_header ] = detect_regularity(data, header, fs, opt);
+else
+    % run SQI based switching (it's the only other option)
+    [ qrs, sqi, qrs_comp, qrs_header ] = detect_sqi(data, header, fs, opt);
+end
+
+end