DataFrame¶

Import composer packages by calling autoload.php.

require_once __DIR__ . '/vendor/autoload.php';

then load DataFrame class

use devfym\Data\DataFrame;

Create new instance of DataFrame

$df = new DataFrame();

For Method examples, use following sample data:

$sample = [
    'name'      => ['aaron','bambi','celine','dennise', 'edwin'],
    'age'       => [12, 14, 16, 18, 20],
    'height_cm' => [150, 168, 172, 178, 180],
    'weight_kg' => [36, 40, 56, 60, 78]
];

The $sample is consists of 4 columns with 5 indices.

Methods¶

readArray($sample = [])¶

@param array $sample

Set sample data into instance of DataFrame.

$df->readArray($sample);

getColumns()¶

@return array

It will return list of columns in DataFrame instance.

$df->getColumns();

// return ['name', 'age', 'height_cm', 'weight_kg']

getIndex()¶

@return int

It will return count of samples in DataFrame instance.

$df->getIndex();

// return 5

mean ($floatPoint = 1)¶

@param int $floatPoint
@return array

Get list of mean value in DataFrame where DataType = "Numeric".

$df->mean();

// return ['age' => 16.0, 'height_cm' => 169.6, 'weight_kg' = 54.0]

max ($floatPoint = 1)¶

@param int $floatPoint
@return array

Get list of max value in DataFrame where DataType = "Numeric".

$df->max();

// return ['age' => 20.0, 'height_cm' => 180.0, 'weight_kg' => 78.0]

min ($floatPoint = 1)¶

@param int $floatPoint
@return array

Get list of min value in DataFrame where DataType = "Numeric".

$df->min();

// return ['age' => 12.0, 'height_cm' => 150.0, 'weight_kg' => 36.0]