1-D signal to 2D feature map

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Bahadir 2025-10-8，23:26

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https://ww2.mathworks.cn/matlabcentral/answers/2180469-1-d-signal-to-2d-feature-map

评论： Bahadir 2025-10-13，11:02

data.mat

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Dear Sir,

I have 1000 points Ia,Ib and Ic dataset. I attached data.mat

ı want to segmentation and reconsruction like the picture.

Every segment has 300 point, overlapping 75 points

is my code true?

load("data.mat");
Ia=data(:,1);
Ib=data(:,2);
Ic=data(:,3);
L = 300;  % Seqmentation
O = 75;   % overlap
S = L - O; % Slide step
numSegments = floor((length(Ia)-L)/S) + 1;
featureMaps = cell(numSegments,1);
for k = 1:numSegments
    idxStart = (k-1)*S + 1;
    idxEnd   = idxStart + L - 1;
    
    % Segmentleri al
    segIa = Ia(idxStart:idxEnd);
    segIb = Ib(idxStart:idxEnd);
    segIc = Ic(idxStart:idxEnd);
    
    % Üç fazı dikey olarak birleştir (300x3)
    segmentData = [segIa(:), segIb(:), segIc(:)];
    
    % Reshape to 900x1 
    flatData = reshape(segmentData, [900, 1]);
    
    % Reshape to 30x30 feature map
    featureMap = reshape(flatData, [30, 30]);
    
    featureMaps{k} = featureMap;
end
% visualization
figure;
imagesc(featureMaps{1});
colormap('jet');
colorbar;
title('2-D Feature Map (Segment 1)');
xlabel('Columns');
ylabel('Rows');