Converting code from 6.1.4 to develop branch

[spiovesan]

I am using some example written for Shogun 6.1.4 with the develop branch and I am having some issues. I can handle class name changes, use of shared pointers but some functions look disappeared as SGMatrix<T>::transpose_matrix()and SGMatrix<T>::submatrix(). Is there some documentation how to port the code from 6.1.4 to current branch?

[karlnapf]

Hi Yes that’s gone. All languages that you can use shogun from have that functionality. Which one are you using? In c++ this can be done using e.g. eigen3 If you show some snippets we can give pointers There unfortunately is no guide for porting atm (7.0 not released yet)

[spiovesan]

Hi, this is the code sample I am trying to convert:

    auto csv_file = std::make_shared<CSVFile>(dataset_name.string().c_str());
    Matrix data;
    data.load(csv_file);

    // Exclude cluster and index info from data
    // Shogun csv loader loads matrixes in column major order
    Matrix::transpose_matrix(data.matrix, data.num_rows, data.num_cols);
    Matrix inputs = data.submatrix(1, data.num_cols - 1);  // make a view
    inputs = inputs.clone();                // copy exact data
    Matrix outputs = data.submatrix(3, 4);  // make a view
    outputs = outputs.clone();              // copy exact data

    // Transpose back because shogun algorithms expect that samples are in
    // colums
    Matrix::transpose_matrix(inputs.matrix, inputs.num_rows,
                             inputs.num_cols);

I am trying to use this booksample code. I think I will hit hard on something else...

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