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fann_subset_train_data

(PECL fann >= 1.0.0)

fann_subset_train_dataReturns an copy of a subset of the train data

Beschreibung

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()

Parameter-Liste

data

Resource für Trainingsdaten eines neuralen Netzwerks.

pos

Starting position.

length

The number of copied elements.

Rückgabewerte

Gibt bei Erfolg eine Resource mit Trainingsdaten zurück, ansonsten FALSE im Fehlerfall.

Siehe auch

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geekgirl dot joy at gmail dot com
3 months 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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