How to get residual and other info in eemd?

Hello everyone!

I am using the IMF = eemd(y,aim,NR,Nstd) function. I get only IMF info, but when I want to put more out put arguments like emd function [imf, residual, info], the function does not accept. Does any one help me with interrogating residual and other info like we can get in emd?

Thanks in advance,

[KSSV]

Is eemd a inbuilt function of MATLAB?

[Jan Ali]

Hi,

No, the eemd is not an inbuilt function. I found the function in Github, modified a bit and used in Matlab.

Here is the function I used:

aim = 5; % numbers of IMF

NR = 10; % value of ensemble: represents the number of ensembles of EEMD. For each ensemble different white noise is added with the signal.

Nstd = 0.3; % param to white noise: represents the white noise that is added. Here 0.3 means the randomly generated white noise has a std of 0.3.

IMF1=eemd(y,aim,NR,Nstd);

and the eemd.m

function [modes] = eemd(y, aim, NR, Nstd)

stdy = std(y);

if stdy < 0.01

stdy = 1;

end

y = y ./ stdy;

siz = length(y);

modes = zeros(aim+1, siz);

for k = 1:NR

disp(['Ensemble number #' num2str(k)]);

wn = randn(1, siz) .* Nstd;

y1 = y + wn;

y2 = y - wn;

modes = modes + emd(y1, aim);

if Nstd > 0 && NR > 1

modes = modes + emd(y2, aim);

end

end

modes = modes .* stdy ./ (NR);

if Nstd > 0 && NR > 1

modes = modes ./ 2;

end

end

Answer 1

[Abhishek Kolla]

Modify the function definition so that it will output three outputs as expected. Try creating seperate function with a different name like this

function [op1,op2,op3]=fnname(ip1,ip2,ip3,ip4);

Also modify the code in the function block to include definitions for op2,op3. This should solve your problem.