Index exceeds the number of array elements (1).

I faced this error after performing some changes on the code. Any advices?

lgraph = yolov2Layers([128 128 3],numClasses,Anchors,lgraph,'relu_6');

Error using yolov2Layers>iReplaceImageInputLayer (line 298)

Index exceeds the number of array elements (1).

Error in yolov2Layers (line 112)

lgraph = iReplaceImageInputLayer(lgraph,params.ImageSize);

function lgraph = iReplaceImageInputLayer(lgraph,imageSize)
% Replace input size in image input layer.
    idx = arrayfun(@(x)isa(x,'nnet.cnn.layer.ImageInputLayer'),...
        lgraph.Layers);
    imageInputIdx = find(idx,1,'first');
    imageInput =  vision.internal.cnn.utils.updateImageLayerInputSize(...
        lgraph.Layers(imageInputIdx), imageSize);
    lgraph = replaceLayer(lgraph,lgraph.Layers(imageInputIdx).Name,...
        imageInput);
    
    % Validate that replaced layer does not cause any issue.
    analysis = nnet.internal.cnn.analyzer.NetworkAnalyzer(lgraph);
    analysis.applyConstraints();
    if any(isnan(analysis.LayerAnalyzers(2,1).Outputs.Size{1}))
        error(message('vision:yolo:InvalidLayerSize', ... 
             mat2str(analysis.LayerAnalyzers(2,1).Inputs.Size{1}),...
             mat2str([analysis.LayerAnalyzers(2,1).Inputs.Size{1}(1:2),...
             analysis.LayerAnalyzers(2,1).Learnables.Size{1}(3)])));
    end
end

Answer 1

[Sai Sri Pathuri]

This error generally occurs when you access the index that is not present (or) more than the number of elements

For example,

A = [1,2,3,4,5,6];

If you try to access the 7th element of A, it gives this error including in bracket the actual number of elements in the array, which is 6 here

A(7)
Index exceeds the number of array elements (6).