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Fann Functions
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# fann_create_train_from_callback

(PECL fann >= 1.0.0)

fann_create_train_from_callback — Creates the training data struct from a user supplied function

### Description

resource fann_create_train_from_callback ( int `$num_data` , int `$num_input` , int `$num_output` , collable `$user_function` )

Creates the training data struct from a user supplied function. As the training data are numerable (data 1, data 2...), the user must write a function that receives the number of the training data set (input, output) and returns the set.

### Parameters

`num_data`

  The number of training data

`num_input`

  The number of inputs per training data

`num_output`

  The number of ouputs per training data

`user_function`

  The user supplied function with following parameters:

  - num - The number of the training data set
  - num_input - The number of inputs per training data
  - num - The number of ouputs per training dataThe number of inputs per training data

  The function should return an associative array with keys input and output and two array values of input and output.

### Return Values

Returns a train data resource on success, or `FALSE` on error.

### Examples

Example #1 fann_create_train_from_callback() example

`<?php
function create_train_callback($num_data, $num_input, $num_output) {
return array(
"input" => array_fill(0, $num_input, 1),
"output" => array_fill(0, $num_output, 1),
);
}
$num_data = 3;
$num_input = 2;
$num_output = 1;
$train_data = fann_create_train_from_callback($num_data, $num_input, $num_output, "create_train_callback");
if ($train_data) {
// Do something with $train_data
}
?>`

### See Also

- fann_read_train_from_file() - Reads a file that stores training data
- fann_train_on_data() - Trains on an entire dataset for a period of time
- fann_destroy_train() - Destructs the training data
- fann_save_train() - Save the training structure to a file

fann_create_standard
fann_create_train
Fann Functions
PHP Manual