calculate the area of Estimate Anchor Boxes

Hello, I was recently programmed in MATLAB to detect certain parts by yoloV4 ..and I reached the training stage to calculate the area of anchor boxes, at the beginning of the code for calculating it. it begin appear error, I don't know why

the code, the error in [anchors,meanIoU]

trainingDataForEstimation = transform(trainingData,@(data)preprocessData(data,inputSize));
numAnchors = 9;
[anchors,meanIoU] = estimateAnchorBoxes(trainingDataForEstimation, numAnchors);

the message error :-

92  [anchors,meanIoU] = estimateAnchorBoxes(trainingDataForEstimation, numAnchors);
Invalid transform function defined on datastore.

The cause of the error was:

Unable to perform assignment because the size of the left side is 1-by-3 and the size of the right side is 1-by-2.

Error in recognitionThree>preprocessData (line 220)
    data(ii,2:4) = {I, Wboxes}

Error in recognitionThree>@(data)preprocessData(data,inputSize) (line 90)
trainingDataForEstimation = transform(trainingData,@(data)preprocessData(data,inputSize));

Error in matlab.io.datastore.TransformedDatastore/applyTransforms (line 723)
                            data = ds.Transforms{ii}(data);

Error in matlab.io.datastore.TransformedDatastore/read (line 235)
            [data, info] = ds.applyTransforms(data, info);

Error in matlab.io.datastore.TransformedDatastore/readall (line 300)
                data{end+1} = read(copyds); %#ok<AGROW>

Error in estimateAnchorBoxes>iReadallBoxes (line 270)
        boxes = readall(ds);

Error in estimateAnchorBoxes>iCheckBoxesFromDatastore (line 215)
    boxes = iReadallBoxes(ds);

Error in estimateAnchorBoxes>iParseInputs (line 168)
    boxes = iCheckBoxesFromDatastore(datastore);

Error in estimateAnchorBoxes (line 136)
    [boxes, numAnchors, params] = iParseInputs(datastore, numAnchors, varargin{:});

Error in recognitionThree (line 92)
[anchors,meanIoU] = estimateAnchorBoxes(trainingDataForEstimation, numAnchors);
 

Answer 1

[Walter Roberson]

recognitionThree appears to be code you wrote. The code

data(ii,2:4) = {I, Wboxes}

appears to be your code. You are trying to assign a cell array of length 2 into an array that expects 3 elements.

If WBoxes is already a cell of length 2, then use

data(ii,2:4) = [I, Wboxes(:).'];