Gradient descent: Difference between revisions
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(→{{header|Wren}}: Now uses new core library method.) |
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=={{header|Wren}}== |
=={{header|Wren}}== |
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{{trans|Go}} |
{{trans|Go}} |
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{{libheader|Wren-math}} |
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{{libheader|Wren-fmt}} |
{{libheader|Wren-fmt}} |
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<lang ecmascript>import "/ |
<lang ecmascript>import "/fmt" for Fmt |
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import "/fmt" for Fmt |
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// Function for which minimum is to be found. |
// Function for which minimum is to be found. |
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var g = Fn.new { |x| |
var g = Fn.new { |x| |
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return (x[0]-1)*(x[0]-1)* |
return (x[0]-1)*(x[0]-1)* |
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(-x[1]*x[1]).exp + x[1]*(x[1]+2)* |
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(-2*x[0]*x[0]).exp |
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} |
} |
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var x = p[0] |
var x = p[0] |
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var y = p[1] |
var y = p[1] |
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return [2*(x-1)* |
return [2*(x-1)*(-y*y).exp - 4*x*(-2*x*x).exp*y*(y+2), |
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-2*(x-1)*(x-1)*y* |
-2*(x-1)*(x-1)*y*(-y*y).exp + (-2*x*x).exp*(y+2) + (-2*x*x).exp*y] |
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} |
} |
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