Why dot indexing is not supported for variables of this type using EMD method in MATLAB R2019a version ? What can I do?

code:

[IMF, residual, info] = emd(eeg_signal);
imf_count = max(info.NumIMF);

Dot indexing is not supported for variables of this type.

[Komal]

Thanks a lot sir.

Answer 1

[KSSV]

It seems IMF is not a sturcutre. Check

class(IMF)

If it is double. Try

max(IMF)

[Komal]

Dear experts,

Here is my code with dataset . I try to follow your instruction but couldn't work at R2019a MATLAB.Please give me an idea or solution of this.

Dataset: https://drive.google.com/file/d/1BnLIT1r6J7Nf4x5eJ6WDEbthEp_xJ47k/view?usp=sharing

Code:

%%
clc
clear 
close all;
load B02T.mat;

fs=250;
% t = 0.004:1/fs:1;

eeg1 = data{1,1}.X;
channel_1= eeg1(:,1);
ch_1=channel_1;
figure;
subplot(2,1,1);
plot(ch_1);

xlabel('Time (s)');
ylabel('Amplitude (µV)');
legend('ch1');
title("Plot channel "+1+ " for Structure 1X1");
hold on; 
grid on;

eeg_signal = eeg1(1:2000); % first 2000 samples

subplot(2,1,2);
plot(eeg_signal,'black');
hold on;
grid on;
xlabel('Time (s)');
ylabel('Amplitude (µV)');
legend('EEG Signal');
title('Contaminated EEG Signal');
%%

[IMF, residual, info] = emd(eeg_signal);

imf_count = max(info.NumIMF);
figure;
for i=1:imf_count
    subplot(6,2,i)
    plot(IMF(:,i))
    title("IMF"+i);
end

subplot(6,2,imf_count+1)
plot(residual)
title("Residue");

[Walter Roberson]

You would need,

imf_count = max(info.numIMF);

However, since you use the value to loop over columns of the array IMF, it would make more sense to instead use

imf_count = size(IMF,2);

[Komal]

Dear sir,

This problem is remain at still now. Can you give any more idea ?

[Walter Roberson]

For some reason it must have returned [] for info