php-ai /
php-ml
| @@ 273-277 (lines=5) @@ | ||
| 270 | $X = $this->getSubMatrix($B->toArray(), $this->piv, 0, $nx - 1); |
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| 271 | // Solve L*Y = B(piv,:) |
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| 272 | for ($k = 0; $k < $this->n; ++$k) { |
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| 273 | for ($i = $k + 1; $i < $this->n; ++$i) { |
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| 274 | for ($j = 0; $j < $nx; ++$j) { |
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| 275 | $X[$i][$j] -= $X[$k][$j] * $this->LU[$i][$k]; |
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| 276 | } |
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| 277 | } |
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| 278 | } |
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| 279 | ||
| 280 | // Solve U*X = Y; |
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| @@ 286-290 (lines=5) @@ | ||
| 283 | $X[$k][$j] /= $this->LU[$k][$k]; |
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| 284 | } |
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| 285 | ||
| 286 | for ($i = 0; $i < $k; ++$i) { |
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| 287 | for ($j = 0; $j < $nx; ++$j) { |
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| 288 | $X[$i][$j] -= $X[$k][$j] * $this->LU[$i][$k]; |
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| 289 | } |
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| 290 | } |
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| 291 | } |
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| 292 | ||
| 293 | return $X; |
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