Fast Artificial Neural Network Libraryを使ってみる

まず、libraryを入れます。

[vagrant@localhost fann]$ sudo yum install fann-devel
あれ、全然うまくいってない。。

$num_input = 2;
$num_output = 1;
$num_layers = 3;
$num_neurons_hidden = 3;
$desired_error = 0.001;
$max_epochs = 500000;
$epochs_between_reports = 1000;

$ann = fann_create_standard($num_layers, $num_input, $num_neurons_hidden, $num_output);

if ($ann) {
    fann_set_activation_function_hidden($ann, FANN_SIGMOID_SYMMETRIC);
    fann_set_activation_function_output($ann, FANN_SIGMOID_SYMMETRIC);

    $filename = dirname(__FILE__) . "/xor.data";
    if (fann_train_on_file($ann, $filename, $max_epochs, $epochs_between_reports, $desired_error))
        fann_save($ann, dirname(__FILE__) . "/xor_float.net");

    fann_destroy($ann);
}

ぬ、やっぱり。
[Fri Aug 30 08:52:09 2019] 192.168.33.1:60110 [500]: / – Call to undefined function fann_create_standard() in /home/vagrant/local/fann/index.php on line 10

ぐ。。