fann_subset_train_data

    (PECL fann >= 1.0.0)

    fann_subset_train_data — Returns an copy of a subset of the train data

    説明

    fann_subset_train_data(resource $data, int $pos, int $length): resource

    Returns an copy of a subset of the train data resource, starting at position pos and length elements forward.

    The fann_subset_train_data(train_data, 0, fann_length_train_data(train_data)) do the same as fann_duplicate_train_data()

    パラメータ

    data

    ニューラルネットワークトレーニングリソース。

    pos

    Starting position.

    length

    The number of copied elements.

    戻り値

    成功した場合にニューラルネットワークトレーニングリソース、エラー時に false を返します。

    参考

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    User Contributed Notes 1 note

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    geekgirl dot joy at gmail dot com
    5 years ago
    <?php
    // Use this code to split your data into smaller sets.
    // Useful for splitting your training data into training and testing groups

    // Load Data
    $data_file = "MyTrainingData.data";
    $train_data = fann_read_train_from_file(dirname(__FILE__) . DIRECTORY_SEPARATOR . $data_file);

    // Calculate how many examples are in the first group
    $total_length = fann_length_train_data($train_data);
    $a_length = floor($total_length / 10);

    // Split the subsets
    $training_data_a = fann_subset_train_data($train_data, 0, $a_length);
    $training_data_b = fann_subset_train_data($train_data, $a_length, $total_length-$a_length);

    // Save the training data to separate files
    fann_save_train ($training_data_a, 'MyTrainingData_Subset_A.data'); // 1/10 of the training data
    fann_save_train ($training_data_b, 'MyTrainingData_Subset_B.data'); // 9/10 of the training data
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