# | Line 24 | Line 24 | double copysign(double sign, double value){ | |
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24 | ||
25 | return sign >= 0 ? result : -result; | |
26 | } | |
27 | + | |
28 | + | double norm2(vector<double>& x){ |
29 | + | return sqrt(dotProduct(x, x)); |
30 | + | } |
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