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<?php |
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namespace Np; |
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/** |
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* Operations |
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* A fast lite & memory efficient Scientific Computing for php |
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* |
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* @package NP |
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* @category Scientific Computing |
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* @author ghost (Shubham Chaudhary) |
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* @email [email protected] |
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* @copyright (c) 2020-2021, Shubham Chaudhary |
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*/ |
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trait ops { |
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/** |
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* Return the element-wise maximum of two matrices| two vectors. |
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* @param matrix|vector $d |
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* @return matrix|vector |
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*/ |
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public function max(matrix|vector $d): matrix|vector { |
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if ($this instanceof matrix && $d instanceof matrix && $this->checkShape($this, $d) && $this->checkDtype($this, $d)) { |
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$r = self::factory($this->row, $this->col, $this->dtype); |
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} elseif ($this instanceof vector && $d instanceof vector && $this->checkShape($this, $d) && $this->checkDtype($this, $d)) { |
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$r = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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$r->data[$i] = max($this->data[$i], $d->data[$i]); |
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} |
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return $r; |
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} |
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/** |
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* Return the element-wise minimum of two matrices|two vectors. |
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* @param matrix|vector $d |
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* @return matrix|vector |
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*/ |
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public function min(matrix|vector $d): matrix|vector { |
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if ($this instanceof matrix && $d instanceof matrix && $this->checkShape($this, $d) && $this->checkDtype($this, $d)) { |
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$r = self::factory($this->row, $this->col, $this->dtype); |
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} elseif ($this instanceof vector && $d instanceof vector && $this->checkShape($this, $d) && $this->checkDtype($this, $d)) { |
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$r = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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$r->data[$i] = max($this->data[$i], $d->data[$i]); |
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} |
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return $r; |
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} |
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/** |
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* Run a function over all of the elements in the matrix|vector. |
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* @param callable $func |
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* @return matrix|vector |
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*/ |
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public function map(callable $func): matrix|vector { |
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if ($this instanceof matrix) { |
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$r = self::factory($this->row, $this->col, $this->dtype); |
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} else { |
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$r = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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$r->data[$i] = $func($this->data[$i]); |
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} |
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return $r; |
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} |
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public function abs(): matrix|vector { |
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return $this->map('abs'); |
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} |
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public function sqrt(): matrix|vector { |
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return $this->map('sqrt'); |
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} |
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public function exp(): matrix|vector { |
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return $this->map('exp'); |
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} |
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public function exp1(): matrix|vector { |
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return $this->map('exp1'); |
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} |
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public function log(float $b = M_E): matrix|vector { |
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$ar = $this->copy(); |
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for ($i = 0; $i < $ar->ndim; ++$i) { |
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log($ar->data[$i], $b); |
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} |
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return $ar; |
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} |
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public function log1p(): matrix { |
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return $this->map('log1p'); |
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} |
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public function sin(): matrix { |
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return $this->map('sin'); |
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} |
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public function asin(): matrix { |
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return $this->map('asin'); |
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} |
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public function cos(): matrix { |
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return $this->map('cos'); |
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} |
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public function acos(): matrix { |
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return $this->map('acos'); |
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} |
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public function tan(): matrix { |
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return $this->map('tan'); |
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} |
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public function atan(): matrix { |
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return $this->map('atan'); |
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} |
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public function radToDeg(): matrix { |
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return $this->map('rad2deg'); |
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} |
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public function degToRad(): matrix { |
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return $this->map('deg2rad'); |
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} |
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public function floor(): matrix { |
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return $this->map('floor'); |
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} |
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public function ceil(): matrix { |
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return $this->map('ceil'); |
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} |
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/** |
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* make a copy of matrix|vector; |
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* @return matrix|vector |
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*/ |
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public function copy(): matrix|vector { |
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return clone $this; |
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} |
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/** |
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* Clip the elements in the matrix to be between given minimum and maximum |
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* and return a new matrix. |
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* |
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* @param float $min |
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* @param float $max |
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* @return matrix |
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*/ |
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public function clip(float $min, float $max): matrix|vector { |
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if ($this instanceof matrix) { |
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$ar = self::factory($this->row, $this->col, $this->dtype); |
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} else { |
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$ar = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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if ($this->data[$i] > $max) { |
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$ar->data[$i] = $max; |
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continue; |
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} |
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if ($this->data[$i] < $min) { |
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$ar->data[$i] = $min; |
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continue; |
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} |
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$ar->data[$i] = $this->data[$i]; |
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} |
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return $ar; |
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} |
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/** |
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* Clip the matrix|vector to be lower bounded by a given minimum. |
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* @param float $min |
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* @return matrix |
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*/ |
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public function clipLower(float $min): matrix { |
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if ($this instanceof matrix) { |
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$ar = self::factory($this->row, $this->col, $this->dtype); |
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} else { |
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$ar = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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if ($this->data[$i] < $min) { |
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$ar->data[$i] = $min; |
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continue; |
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} |
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$ar->data[$i] = $this->data[$i]; |
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} |
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return $ar; |
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} |
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/** |
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* Clip the matrix|vector to be upper bounded by a given maximum. |
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* |
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* @param float $max |
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* @return matrix |
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*/ |
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public function clipUpper(float $max): matrix|vector { |
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if ($this instanceof matrix) { |
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$ar = self::factory($this->row, $this->col, $this->dtype); |
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} else { |
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$ar = self::factory($this->col, $this->dtype); |
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} |
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for ($i = 0; $i < $this->ndim; ++$i) { |
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if ($this->data[$i] > $max) { |
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$ar->data[$i] = $max; |
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continue; |
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} |
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$ar->data[$i] = $this->data[$i]; |
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} |
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return $ar; |
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} |
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/** |
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* return a reshaped data buffer as matrix |
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* @param int $row |
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* @param int $col |
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* @return matrix |
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*/ |
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public function reshape(int $row, int $col): matrix { |
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if ($this->ndim != $row * $col) { |
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self::_dimensionaMisMatchErr('given dimenssion is not valid for current bufferData'); |
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} |
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if ($this instanceof vector) { |
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$ar = matrix::factory($row, $col, $this->dtype); |
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$ar->data = $this->data; |
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return $ar; |
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} |
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$this->row = $row; |
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$this->col = $col; |
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return $this; |
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} |
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} |
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