Create a cicle 'for' to create multiple fields

    data.C028 = importdata('C028 S1.mat');
    data.C028 = data.C028.data;

    ecg_C028 = data.C028(:,6);

    % File 2/5


    data.C022 = importdata('C022 S1.mat');
    data.C022 = data.C022.data;

    ecg_C022 = data.C022(:,6);

    % File 3/5

    data.C008 = importdata('C008 S1.mat');
    data.C008 = data.C008.data;

    ecg_C008 = data.C008(:,6);


    % File 4/5

    data.C006 = importdata('C006 S1.mat');
    data.C006 = data.C006.data;

    ecg_C006 = data.C006(:,6);

Answer 1

[Voss]

data = struct();
fn = {'C028' 'C022' 'C008' 'C006'};
for i = 1:numel(fn)
    data.(fn{i}) = getfield(importdata([fn{i} ' S1.mat']),'data');
end

[Rita Barnabé]

Thank you, it did helped