SupportVectorMachine::setVarPath() - Code Metrics - Inspection of "Making SVM bin/var paths more portable" - php-ai/php-ml - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#400)

unknown

created 2019-08-01 19:01 UTC

SupportVectorMachine::setVarPath() A

↳ Parent: SupportVectorMachine

Complexity

Conditions	3
Paths	3

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	5
c	1
b	0
f	0
dl	0
loc	10
rs	10
cc	3
nc	3
nop	1

<?php

declare(strict_types=1);

namespace Phpml\SupportVectorMachine;

use Phpml\Exception\InvalidArgumentException;
use Phpml\Exception\InvalidOperationException;
use Phpml\Exception\LibsvmCommandException;
use Phpml\Helper\Trainable;

class SupportVectorMachine
{
    use Trainable;

    /**
     * @var int
     */
    private $type;

    /**
     * @var int
     */
    private $kernel;

    /**
     * @var float
     */
    private $cost;

    /**
     * @var float
     */
    private $nu;

    /**
     * @var int
     */
    private $degree;

    /**
     * @var float|null
     */
    private $gamma;

    /**
     * @var float
     */
    private $coef0;

    /**
     * @var float
     */
    private $epsilon;

    /**
     * @var float
     */
    private $tolerance;

    /**
     * @var int
     */
    private $cacheSize;

    /**
     * @var bool
     */
    private $shrinking;

    /**
     * @var bool
     */
    private $probabilityEstimates;

    /**
     * @var ?string
     */
    private $binPath = null;

    /**
     * @var ?string
     */
    private $varPath = null;

    /**
     * @var string
     */
    private $model;

    /**
     * @var array
     */
    private $targets = [];

    public function __construct(
        int $type,
        int $kernel,
        float $cost = 1.0,
        float $nu = 0.5,
        int $degree = 3,
        ?float $gamma = null,
        float $coef0 = 0.0,
        float $epsilon = 0.1,
        float $tolerance = 0.001,
        int $cacheSize = 100,
        bool $shrinking = true,
        bool $probabilityEstimates = false
    ) {
        $this->type = $type;
        $this->kernel = $kernel;
        $this->cost = $cost;
        $this->nu = $nu;
        $this->degree = $degree;
        $this->gamma = $gamma;
        $this->coef0 = $coef0;
        $this->epsilon = $epsilon;
        $this->tolerance = $tolerance;
        $this->cacheSize = $cacheSize;
        $this->shrinking = $shrinking;
        $this->probabilityEstimates = $probabilityEstimates;
    }

    /**
     * Sets a new bin path for the SVM model.
     * If null is provided, the default bin path will be used.
     *
     * @param string|null $binPath
     *
     * @throws InvalidArgumentException
     */
    public function setBinPath(?string $binPath): void
    {
        if ($binPath !== null) {
            $this->ensureDirectorySeparator($binPath);
            $this->verifyBinPath($binPath);
        }
        $this->binPath = $binPath;
    }

    /**
     * Sets a new var path for the SVC model.
     * If null is provided, the default var path will be used.
     *
     * @param string|null $varPath
     *
     * @throws InvalidArgumentException
     */
    public function setVarPath(?string $varPath): void
    {
        if ($varPath !== null) {
            if (!is_writable($varPath)) {
                throw new InvalidArgumentException(sprintf('The specified path "%s" is not writable', $varPath));
            }

            $this->ensureDirectorySeparator($varPath);
        }
        $this->varPath = $varPath;
    }

    public function train(array $samples, array $targets): void
    {
        $this->samples = array_merge($this->samples, $samples);
        $this->targets = array_merge($this->targets, $targets);

        $trainingSet = DataTransformer::trainingSet($this->samples, $this->targets, in_array($this->type, [Type::EPSILON_SVR, Type::NU_SVR], true));
        file_put_contents($trainingSetFileName = $this->getVarPath().uniqid('phpml', true), $trainingSet);
        $modelFileName = $trainingSetFileName.'-model';

        $command = $this->buildTrainCommand($trainingSetFileName, $modelFileName);
        $output = [];
        exec(escapeshellcmd($command).' 2>&1', $output, $return);

        unlink($trainingSetFileName);

        if ($return !== 0) {
            throw new LibsvmCommandException(
                sprintf('Failed running libsvm command: "%s" with reason: "%s"', $command, array_pop($output))
            );
        }

        $this->model = (string) file_get_contents($modelFileName);

        unlink($modelFileName);
    }

    public function getModel(): string
    {
        return $this->model;
    }

    /**
     * @return array|string
     *
     * @throws LibsvmCommandException
     */
    public function predict(array $samples)
    {
        $predictions = $this->runSvmPredict($samples, false);

        if (in_array($this->type, [Type::C_SVC, Type::NU_SVC], true)) {
            $predictions = DataTransformer::predictions($predictions, $this->targets);
        } else {
            $predictions = explode(PHP_EOL, trim($predictions));
        }

        if (!is_array($samples[0])) {
            return $predictions[0];
        }

        return $predictions;
    }

    /**
     * @return array|string
     *
     * @throws LibsvmCommandException
     */
    public function predictProbability(array $samples)
    {
        if (!$this->probabilityEstimates) {
            throw new InvalidOperationException('Model does not support probabiliy estimates');
        }

        $predictions = $this->runSvmPredict($samples, true);

        if (in_array($this->type, [Type::C_SVC, Type::NU_SVC], true)) {
            $predictions = DataTransformer::probabilities($predictions, $this->targets);
        } else {
            $predictions = explode(PHP_EOL, trim($predictions));
        }

        if (!is_array($samples[0])) {
            return $predictions[0];
        }

        return $predictions;
    }

    protected function getBinPath(): string
    {
        return is_string($this->binPath)
            ? $this->binPath
            : static::getRootPath().'bin'.DIRECTORY_SEPARATOR.'libsvm'.DIRECTORY_SEPARATOR;
    }

    protected function getVarPath(): string
    {
        return is_string($this->varPath)
            ? $this->varPath
            : static::getRootPath().'var'.DIRECTORY_SEPARATOR;
    }

    protected static function getRootPath(): string
    {
        return realpath(implode(DIRECTORY_SEPARATOR, [__DIR__, '..', '..'])).DIRECTORY_SEPARATOR;
    }

    private function runSvmPredict(array $samples, bool $probabilityEstimates): string
    {
        $testSet = DataTransformer::testSet($samples);
        file_put_contents($testSetFileName = $this->getVarPath().uniqid('phpml', true), $testSet);
        file_put_contents($modelFileName = $testSetFileName.'-model', $this->model);
        $outputFileName = $testSetFileName.'-output';

        $command = $this->buildPredictCommand(
            $testSetFileName,
            $modelFileName,
            $outputFileName,
            $probabilityEstimates
        );
        $output = [];
        exec(escapeshellcmd($command).' 2>&1', $output, $return);

        unlink($testSetFileName);
        unlink($modelFileName);
        $predictions = (string) file_get_contents($outputFileName);

        unlink($outputFileName);

        if ($return !== 0) {
            throw new LibsvmCommandException(
                sprintf('Failed running libsvm command: "%s" with reason: "%s"', $command, array_pop($output))
            );
        }

        return $predictions;
    }

    private function getOSExtension(): string
    {
        $os = strtoupper(substr(PHP_OS, 0, 3));
        if ($os === 'WIN') {
            return '.exe';
        } elseif ($os === 'DAR') {
            return '-osx';
        }

        return '';
    }

    private function buildTrainCommand(string $trainingSetFileName, string $modelFileName): string
    {
        return sprintf(
            '%ssvm-train%s -s %s -t %s -c %s -n %F -d %s%s -r %s -p %F -m %F -e %F -h %d -b %d %s %s',
            $this->getBinPath(),
            $this->getOSExtension(),
            $this->type,
            $this->kernel,
            $this->cost,
            $this->nu,
            $this->degree,
            $this->gamma !== null ? ' -g '.$this->gamma : '',
            $this->coef0,
            $this->epsilon,
            $this->cacheSize,
            $this->tolerance,
            $this->shrinking,
            $this->probabilityEstimates,
            escapeshellarg($trainingSetFileName),
            escapeshellarg($modelFileName)
        );
    }

    private function buildPredictCommand(
        string $testSetFileName,
        string $modelFileName,
        string $outputFileName,
        bool $probabilityEstimates
    ): string {
        return sprintf(
            '%ssvm-predict%s -b %d %s %s %s',
            $this->getBinPath(),
            $this->getOSExtension(),
            $probabilityEstimates ? 1 : 0,
            escapeshellarg($testSetFileName),
            escapeshellarg($modelFileName),
            escapeshellarg($outputFileName)
        );
    }

    private function ensureDirectorySeparator(string &$path): void
    {
        if (substr($path, -1) !== DIRECTORY_SEPARATOR) {
            $path .= DIRECTORY_SEPARATOR;
        }
    }

    private function verifyBinPath(string $path): void
    {
        if (!is_dir($path)) {
            throw new InvalidArgumentException(sprintf('The specified path "%s" does not exist', $path));
        }

        $osExtension = $this->getOSExtension();
        foreach (['svm-predict', 'svm-scale', 'svm-train'] as $filename) {
            $filePath = $path.$filename.$osExtension;
            if (!file_exists($filePath)) {
                throw new InvalidArgumentException(sprintf('File "%s" not found', $filePath));
            }

            if (!is_executable($filePath)) {
                throw new InvalidArgumentException(sprintf('File "%s" is not executable', $filePath));
            }
        }
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Phpml\SupportVectorMachine;
6
7			use Phpml\Exception\InvalidArgumentException;
8			use Phpml\Exception\InvalidOperationException;
9			use Phpml\Exception\LibsvmCommandException;
10			use Phpml\Helper\Trainable;
11
12			class SupportVectorMachine
13			{
14			use Trainable;
15
16			/**
17			* @var int
18			*/
19			private $type;
20
21			/**
22			* @var int
23			*/
24			private $kernel;
25
26			/**
27			* @var float
28			*/
29			private $cost;
30
31			/**
32			* @var float
33			*/
34			private $nu;
35
36			/**
37			* @var int
38			*/
39			private $degree;
40
41			/**
42			* @var float\|null
43			*/
44			private $gamma;
45
46			/**
47			* @var float
48			*/
49			private $coef0;
50
51			/**
52			* @var float
53			*/
54			private $epsilon;
55
56			/**
57			* @var float
58			*/
59			private $tolerance;
60
61			/**
62			* @var int
63			*/
64			private $cacheSize;
65
66			/**
67			* @var bool
68			*/
69			private $shrinking;
70
71			/**
72			* @var bool
73			*/
74			private $probabilityEstimates;
75
76			/**
77			* @var ?string
78			*/
79			private $binPath = null;
80
81			/**
82			* @var ?string
83			*/
84			private $varPath = null;
85
86			/**
87			* @var string
88			*/
89			private $model;
90
91			/**
92			* @var array
93			*/
94			private $targets = [];
95
96			public function __construct(
97			int $type,
98			int $kernel,
99			float $cost = 1.0,
100			float $nu = 0.5,
101			int $degree = 3,
102			?float $gamma = null,
103			float $coef0 = 0.0,
104			float $epsilon = 0.1,
105			float $tolerance = 0.001,
106			int $cacheSize = 100,
107			bool $shrinking = true,
108			bool $probabilityEstimates = false
109			) {
110			$this->type = $type;
111			$this->kernel = $kernel;
112			$this->cost = $cost;
113			$this->nu = $nu;
114			$this->degree = $degree;
115			$this->gamma = $gamma;
116			$this->coef0 = $coef0;
117			$this->epsilon = $epsilon;
118			$this->tolerance = $tolerance;
119			$this->cacheSize = $cacheSize;
120			$this->shrinking = $shrinking;
121			$this->probabilityEstimates = $probabilityEstimates;
122			}
123
124			/**
125			* Sets a new bin path for the SVM model.
126			* If null is provided, the default bin path will be used.
127			*
128			* @param string\|null $binPath
129			*
130			* @throws InvalidArgumentException
131			*/
132			public function setBinPath(?string $binPath): void
133			{
134			if ($binPath !== null) {
135			$this->ensureDirectorySeparator($binPath);
136			$this->verifyBinPath($binPath);
137			}
138			$this->binPath = $binPath;
139			}
140
141			/**
142			* Sets a new var path for the SVC model.
143			* If null is provided, the default var path will be used.
144			*
145			* @param string\|null $varPath
146			*
147			* @throws InvalidArgumentException
148			*/
149			public function setVarPath(?string $varPath): void
150			{
151			if ($varPath !== null) {
152			if (!is_writable($varPath)) {
153			throw new InvalidArgumentException(sprintf('The specified path "%s" is not writable', $varPath));
154			}
155
156			$this->ensureDirectorySeparator($varPath);
157			}
158			$this->varPath = $varPath;
159			}
160
161			public function train(array $samples, array $targets): void
162			{
163			$this->samples = array_merge($this->samples, $samples);
164			$this->targets = array_merge($this->targets, $targets);
165
166			$trainingSet = DataTransformer::trainingSet($this->samples, $this->targets, in_array($this->type, [Type::EPSILON_SVR, Type::NU_SVR], true));
167			file_put_contents($trainingSetFileName = $this->getVarPath().uniqid('phpml', true), $trainingSet);
168			$modelFileName = $trainingSetFileName.'-model';
169
170			$command = $this->buildTrainCommand($trainingSetFileName, $modelFileName);
171			$output = [];
172			exec(escapeshellcmd($command).' 2>&1', $output, $return);
173
174			unlink($trainingSetFileName);
175
176			if ($return !== 0) {
177			throw new LibsvmCommandException(
178			sprintf('Failed running libsvm command: "%s" with reason: "%s"', $command, array_pop($output))
179			);
180			}
181
182			$this->model = (string) file_get_contents($modelFileName);
183
184			unlink($modelFileName);
185			}
186
187			public function getModel(): string
188			{
189			return $this->model;
190			}
191
192			/**
193			* @return array\|string
194			*
195			* @throws LibsvmCommandException
196			*/
197			public function predict(array $samples)
198			{
199			$predictions = $this->runSvmPredict($samples, false);
200
201			if (in_array($this->type, [Type::C_SVC, Type::NU_SVC], true)) {
202			$predictions = DataTransformer::predictions($predictions, $this->targets);
203			} else {
204			$predictions = explode(PHP_EOL, trim($predictions));
205			}
206
207			if (!is_array($samples[0])) {
208			return $predictions[0];
209			}
210
211			return $predictions;
212			}
213
214			/**
215			* @return array\|string
216			*
217			* @throws LibsvmCommandException
218			*/
219			public function predictProbability(array $samples)
220			{
221			if (!$this->probabilityEstimates) {
222			throw new InvalidOperationException('Model does not support probabiliy estimates');
223			}
224
225			$predictions = $this->runSvmPredict($samples, true);
226
227			if (in_array($this->type, [Type::C_SVC, Type::NU_SVC], true)) {
228			$predictions = DataTransformer::probabilities($predictions, $this->targets);
229			} else {
230			$predictions = explode(PHP_EOL, trim($predictions));
231			}
232
233			if (!is_array($samples[0])) {
234			return $predictions[0];
235			}
236
237			return $predictions;
238			}
239
240			protected function getBinPath(): string
241			{
242			return is_string($this->binPath)
243			? $this->binPath
244			: static::getRootPath().'bin'.DIRECTORY_SEPARATOR.'libsvm'.DIRECTORY_SEPARATOR;
245			}
246
247			protected function getVarPath(): string
248			{
249			return is_string($this->varPath)
250			? $this->varPath
251			: static::getRootPath().'var'.DIRECTORY_SEPARATOR;
252			}
253
254			protected static function getRootPath(): string
255			{
256			return realpath(implode(DIRECTORY_SEPARATOR, [__DIR__, '..', '..'])).DIRECTORY_SEPARATOR;
257			}
258
259			private function runSvmPredict(array $samples, bool $probabilityEstimates): string
260			{
261			$testSet = DataTransformer::testSet($samples);
262			file_put_contents($testSetFileName = $this->getVarPath().uniqid('phpml', true), $testSet);
263			file_put_contents($modelFileName = $testSetFileName.'-model', $this->model);
264			$outputFileName = $testSetFileName.'-output';
265
266			$command = $this->buildPredictCommand(
267			$testSetFileName,
268			$modelFileName,
269			$outputFileName,
270			$probabilityEstimates
271			);
272			$output = [];
273			exec(escapeshellcmd($command).' 2>&1', $output, $return);
274
275			unlink($testSetFileName);
276			unlink($modelFileName);
277			$predictions = (string) file_get_contents($outputFileName);
278
279			unlink($outputFileName);
280
281			if ($return !== 0) {
282			throw new LibsvmCommandException(
283			sprintf('Failed running libsvm command: "%s" with reason: "%s"', $command, array_pop($output))
284			);
285			}
286
287			return $predictions;
288			}
289
290			private function getOSExtension(): string
291			{
292			$os = strtoupper(substr(PHP_OS, 0, 3));
293			if ($os === 'WIN') {
294			return '.exe';
295			} elseif ($os === 'DAR') {
296			return '-osx';
297			}
298
299			return '';
300			}
301
302			private function buildTrainCommand(string $trainingSetFileName, string $modelFileName): string
303			{
304			return sprintf(
305			'%ssvm-train%s -s %s -t %s -c %s -n %F -d %s%s -r %s -p %F -m %F -e %F -h %d -b %d %s %s',
306			$this->getBinPath(),
307			$this->getOSExtension(),
308			$this->type,
309			$this->kernel,
310			$this->cost,
311			$this->nu,
312			$this->degree,
313			$this->gamma !== null ? ' -g '.$this->gamma : '',
314			$this->coef0,
315			$this->epsilon,
316			$this->cacheSize,
317			$this->tolerance,
318			$this->shrinking,
319			$this->probabilityEstimates,
320			escapeshellarg($trainingSetFileName),
321			escapeshellarg($modelFileName)
322			);
323			}
324
325			private function buildPredictCommand(
326			string $testSetFileName,
327			string $modelFileName,
328			string $outputFileName,
329			bool $probabilityEstimates
330			): string {
331			return sprintf(
332			'%ssvm-predict%s -b %d %s %s %s',
333			$this->getBinPath(),
334			$this->getOSExtension(),
335			$probabilityEstimates ? 1 : 0,
336			escapeshellarg($testSetFileName),
337			escapeshellarg($modelFileName),
338			escapeshellarg($outputFileName)
339			);
340			}
341
342			private function ensureDirectorySeparator(string &$path): void
343			{
344			if (substr($path, -1) !== DIRECTORY_SEPARATOR) {
345			$path .= DIRECTORY_SEPARATOR;
346			}
347			}
348
349			private function verifyBinPath(string $path): void
350			{
351			if (!is_dir($path)) {
352			throw new InvalidArgumentException(sprintf('The specified path "%s" does not exist', $path));
353			}
354
355			$osExtension = $this->getOSExtension();
356			foreach (['svm-predict', 'svm-scale', 'svm-train'] as $filename) {
357			$filePath = $path.$filename.$osExtension;
358			if (!file_exists($filePath)) {
359			throw new InvalidArgumentException(sprintf('File "%s" not found', $filePath));
360			}
361
362			if (!is_executable($filePath)) {
363			throw new InvalidArgumentException(sprintf('File "%s" is not executable', $filePath));
364			}
365			}
366			}
367			}
368

php-ai / php-ml

Pull Request — master (#400)

SupportVectorMachine::setVarPath() A

Complexity

Size

Duplication

Importance

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