AR coefficients ?

hi

I will calculated the AR coefficients for each beat of ECG signal form this code but i have an erorr

the code is :

coeffp = zeros(3,size(pvcbeats,2));
for cp = 1:size(pvcbeats,2)
    coeffp(:,cp) = arburg(pvcbeats(:,cp),2) ;
end

for avp = 1:3
avgcoeffp(avp,1) = mean(coeffp(avp,1:length(coeffp)-1));
end

the error is :

??? Error using ==> arburg
Expected X to be nonempty.

Error in ==> arburg at 33
validateattributes(x,{'numeric'},{'nonempty','finite','vector'},'arburg','X');

please help me

thanks a lot .

Answer 1

[Walter Roberson]

That problem could happen if pvcbeats is a matrix whose first dimension is 0 but whose second dimension is non-zero. Try

size(pcvbeats)

to check