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#include <iostream> |
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#include <Eigen/Core> |
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using namespace std; |
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using namespace Eigen; |
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#ifndef VECTYPE |
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#define VECTYPE VectorXLd |
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#endif |
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#ifndef VECSIZE |
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#define VECSIZE 1000000 |
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#endif |
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#ifndef REPEAT |
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#define REPEAT 1000 |
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#endif |
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int main(int argc, char *argv[]) |
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{ |
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VECTYPE I = VECTYPE::Ones(VECSIZE); |
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VECTYPE m(VECSIZE,1); |
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for(int i = 0; i < VECSIZE; i++) |
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{ |
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m[i] = 0.1 * i/VECSIZE; |
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} |
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for(int a = 0; a < REPEAT; a++) |
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{ |
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m = VECTYPE::Ones(VECSIZE) + 0.00005 * (m.cwise().square() + m/4); |
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} |
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cout << m[0] << endl; |
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return 0; |
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} |
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