function data = rrgen(tmax, NoEctopic, NoNoise, seed, filename);
% data = rrgen(tmax, NoEctopic, NoNoise, seed, 'filename');
% generates artificial rr time series over a time tmax seconds
% and dumps the output to 'filename'. If filename is not specified,
% the output is returned into the data array. If it is specified, then the
% data array is zero-valued and of length(tmax).
% If NoEctopic == 1 (YES) then no ectopics are added to the time series.
% If NoNoise == 1 (YES) then no artifact is added to the time series.
% Defaults : tmax=3600*24; NoEctopic=1; NoNoise=1; seed=1;
%
% Requires rrgen binary - compilation of rrgen.c on your system:
% gcc -Wall rrgen.c -lm -o rrgen
%
% (C) P.E. McSharry & G.D. Clifford 2002 under the
% GNU Public License. Contact P. McSharry (patrick@mcsharry.net)
% or G. Clifford (gari@mit.edu)
% Also see - McSharry P.E., Clifford G.D., Tarassenko L.,
% Smith L.: Method for generating an artificial RR tachogram of a typical
% healthy human over 24-hours, Computers in Cardiology, 29:225-228, IEEE
% Computer Society Press, September 2002.
if nargin < 5
filename = 'tmp.dat';
end
if nargin < 4
seed=1;
end
if nargin < 3
NoNoise=1;
end
if nargin < 2
NoEctopic=1;
end
if nargin < 1
tmax=3600*24;
end
if tmax<115
fprintf('Warning, tmax minimum value is 115, using this as default\n')
end
tmax=round(tmax);
eval(['!rrgen ' int2str(seed) ' ' int2str(tmax) ' ' int2str(NoEctopic) ' ' int2str(NoNoise) ' > ' filename]);
fid = fopen(filename,'r');
data = zeros(1,tmax);
for(i=1:tmax)
fscanf(fid,'%f\n',data(i));
end
fclose(fid);
% if not file name read in from tmp.dat and then delete it.
if nargin < 5
load tmp.dat;
data = tmp;
if(ispc==1)
system('del tmp.dat');
else
system('rm tmp.dat');
end
end