Case 2. Review classification: "positive / negative"
Implementation in RubixML
In this case we build a simple RubixML pipeline: transform short reviews into TF–IDF features and train Naive Bayes to detect sentiment (positive/negative). It is a fast and practical baseline for customer feedback analysis.
Example of use
<?php
use Rubix\ML\Datasets\Unlabeled;
include 'code-en.php';
$examples = [
['excellent product'],
['the service is horrible'],
['delivery is very fast'],
['the quality is bad'],
];
$predictions = $estimator->predict(Unlabeled::build($examples));
echo 'Predictions:' . PHP_EOL . '------------' . PHP_EOL;
foreach ($predictions as $id => $prediction) {
$exampleText = (is_int($id) && isset($examples[$id][0])) ? $examples[$id][0] : '';
echo '[' . $id . '] => ' . ($prediction === 'positive' ? '✅ positive' : '❌ negative') . ' (' . $exampleText . ')' . PHP_EOL;
}
Documents:
excellent product with no issues => positive
excellent product highly recommended => positive
excellent product worth the money => positive
excellent product works perfectly => positive
excellent product very satisfied => positive
excellent product pleasant surprise => positive
excellent product exactly what I needed => positive
excellent product super smooth => positive
excellent product top notch => positive
excellent product really happy => positive
excellent product delivery is very fast => positive
excellent product the delivery is very fast and reliable => positive
excellent product very fast delivery and great service => positive
excellent delivery with no issues => positive
excellent delivery highly recommended => positive
excellent delivery worth the money => positive
excellent delivery works perfectly => positive
excellent delivery very satisfied => positive
excellent delivery pleasant surprise => positive
excellent delivery exactly what I needed => positive
excellent delivery super smooth => positive
excellent delivery top notch => positive
excellent delivery really happy => positive
excellent delivery delivery is very fast => positive
excellent delivery the delivery is very fast and reliable => positive
excellent delivery very fast delivery and great service => positive
excellent app with no issues => positive
excellent app highly recommended => positive
excellent app worth the money => positive
excellent app works perfectly => positive
excellent app very satisfied => positive
excellent app pleasant surprise => positive
excellent app exactly what I needed => positive
excellent app super smooth => positive
excellent app top notch => positive
excellent app really happy => positive
excellent app delivery is very fast => positive
excellent app the delivery is very fast and reliable => positive
excellent app very fast delivery and great service => positive
excellent store with no issues => positive
excellent store highly recommended => positive
excellent store worth the money => positive
excellent store works perfectly => positive
excellent store very satisfied => positive
excellent store pleasant surprise => positive
excellent store exactly what I needed => positive
excellent store super smooth => positive
excellent store top notch => positive
excellent store really happy => positive
excellent store delivery is very fast => positive
excellent store the delivery is very fast and reliable => positive
excellent store very fast delivery and great service => positive
excellent experience with no issues => positive
excellent experience highly recommended => positive
excellent experience worth the money => positive
excellent experience works perfectly => positive
excellent experience very satisfied => positive
excellent experience pleasant surprise => positive
excellent experience exactly what I needed => positive
excellent experience super smooth => positive
excellent experience top notch => positive
excellent experience really happy => positive
excellent experience delivery is very fast => positive
excellent experience the delivery is very fast and reliable => positive
excellent experience very fast delivery and great service => positive
excellent order with no issues => positive
excellent order highly recommended => positive
excellent order worth the money => positive
excellent order works perfectly => positive
excellent order very satisfied => positive
excellent order pleasant surprise => positive
excellent order exactly what I needed => positive
excellent order super smooth => positive
excellent order top notch => positive
excellent order really happy => positive
excellent order delivery is very fast => positive
excellent order the delivery is very fast and reliable => positive
excellent order very fast delivery and great service => positive
excellent interface with no issues => positive
excellent interface highly recommended => positive
excellent interface worth the money => positive
excellent interface works perfectly => positive
excellent interface very satisfied => positive
excellent interface pleasant surprise => positive
excellent interface exactly what I needed => positive
excellent interface super smooth => positive
excellent interface top notch => positive
excellent interface really happy => positive
excellent interface delivery is very fast => positive
excellent interface the delivery is very fast and reliable => positive
excellent interface very fast delivery and great service => positive
excellent quality with no issues => positive
excellent quality highly recommended => positive
excellent quality worth the money => positive
terrible service do not recommend => negative
terrible service waste of money => negative
terrible service full of issues => negative
terrible service never again => negative
terrible service very frustrating => negative
terrible service totally disappointed => negative
terrible service quality is poor => negative
terrible service support is useless => negative
terrible service keeps failing => negative
terrible service not worth it => negative
terrible service the service is horrible => negative
terrible service horrible service and poor quality => negative
terrible service the support is horrible and useless => negative
terrible product do not recommend => negative
terrible product waste of money => negative
terrible product full of issues => negative
terrible product never again => negative
terrible product very frustrating => negative
terrible product totally disappointed => negative
terrible product quality is poor => negative
terrible product support is useless => negative
terrible product keeps failing => negative
terrible product not worth it => negative
terrible product the service is horrible => negative
terrible product horrible service and poor quality => negative
terrible product the support is horrible and useless => negative
terrible support do not recommend => negative
terrible support waste of money => negative
terrible support full of issues => negative
terrible support never again => negative
terrible support very frustrating => negative
terrible support totally disappointed => negative
terrible support quality is poor => negative
terrible support support is useless => negative
terrible support keeps failing => negative
terrible support not worth it => negative
terrible support the service is horrible => negative
terrible support horrible service and poor quality => negative
terrible support the support is horrible and useless => negative
terrible delivery do not recommend => negative
terrible delivery waste of money => negative
terrible delivery full of issues => negative
terrible delivery never again => negative
terrible delivery very frustrating => negative
terrible delivery totally disappointed => negative
terrible delivery quality is poor => negative
terrible delivery support is useless => negative
terrible delivery keeps failing => negative
terrible delivery not worth it => negative
terrible delivery the service is horrible => negative
terrible delivery horrible service and poor quality => negative
terrible delivery the support is horrible and useless => negative
terrible app do not recommend => negative
terrible app waste of money => negative
terrible app full of issues => negative
terrible app never again => negative
terrible app very frustrating => negative
terrible app totally disappointed => negative
terrible app quality is poor => negative
terrible app support is useless => negative
terrible app keeps failing => negative
terrible app not worth it => negative
terrible app the service is horrible => negative
terrible app horrible service and poor quality => negative
terrible app the support is horrible and useless => negative
terrible store do not recommend => negative
terrible store waste of money => negative
terrible store full of issues => negative
terrible store never again => negative
terrible store quality is poor => negative
terrible store support is useless => negative
terrible store keeps failing => negative
terrible store not worth it => negative
terrible store the service is horrible => negative
terrible store horrible service and poor quality => negative
terrible store the support is horrible and useless => negative
terrible experience do not recommend => negative
terrible experience waste of money => negative
terrible experience full of issues => negative
terrible experience never again => negative
terrible experience very frustrating => negative
terrible experience totally disappointed => negative
terrible experience quality is poor => negative
terrible experience support is useless => negative
terrible experience keeps failing => negative
terrible experience not worth it => negative
terrible experience the service is horrible => negative
terrible experience horrible service and poor quality => negative
terrible experience the support is horrible and useless => negative
terrible quality do not recommend => negative
terrible quality waste of money => negative
terrible quality full of issues => negative
Examples:
- excellent product
- the service is horrible
- delivery is very fast
- the quality is bad
Result:
Memory: 4.573 Mb
Time running: 0.024 sec.
Predictions:
------------
[0] => ✅ positive (excellent product)
[1] => ❌ negative (the service is horrible)
[2] => ✅ positive (delivery is very fast)
[3] => ❌ negative (the quality is bad)