Read run-length encoding data from a table

You can probably avoid the above step by reading the data in in proper format as numeric from the beginning, though; I presume these came from some other input file? Show us the format for it and we can probably read directly into numeric array.

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Jacopo Biasetti 2022-7-10

train_ship_segmentations_v2_small_dataset.csv

Thanks for your reply.

Here is the original file, it comes in csv format.

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Answer 2

Jan 2022-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/1756525-read-run-length-encoding-data-from-a-table#answer_1003965

编辑：Jan 2022-7-10

在 MATLAB Online 中打开

This is one of the files I would not import with readtable, but manually:

[fid, msg] = fopen(FileName, 'r');
assert(fid > 0, 'Cannot read file: %s', msg);
k = 0;
Header = fgetl(fid);
while ~feof(fid)
    S = fgetl(fid);
    if ~isempty(S)
        k = k + 1;
        [File, Value] = strtok(S, ',')
        Data(k).File  = File;
        Num           = sscanf(Value(2:end), '%g');
        
        % Decode run-length encoded values:
        Data(k).Value = repelem(Num(1:2:end), Num(2:2:end));
        % Or maybe:
        % ??? Data(k).Value = repelem(Num(2:2:end), Num(1:2:end));
    end
end
fclose(fid);