mirror of
https://github.com/triqs/dft_tools
synced 2024-11-02 12:13:46 +01:00
3fe400d34c
- examples split from the rst file using a python script (split_code). - Final result for the doc is unchanged. - examples are compiled and tested with the other tests. - examples' code have been clang-formatted, with triqs style. - doc compiles much faster, and with the same options as the rest of the test. - examples are added as tests, so they are run by make test, as simple C tests. - done for the tutorials and the reference. - autocompile removed (changed into triqs_example directive). - add triqs_example : - make a literal include of the source code. - runs the compiled example - add, as before, the result to the source code in the doc. - added the script split_code, used to make the changes automatically, maybe for later reuse. (in _tools)
24 lines
545 B
C++
24 lines
545 B
C++
#include <triqs/arrays.hpp>
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#include <triqs/arrays/functional/fold.hpp>
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using namespace triqs;
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double frobenius_norm(arrays::matrix<double> const& a) {
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auto l = [](double r, double x) {
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auto ab = std::abs(x);
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return r + ab * ab;
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};
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return std::sqrt(arrays::fold(l)(a, 0));
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}
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int main() {
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// declare and init a matrix
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clef::placeholder<0> i_;
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clef::placeholder<1> j_;
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arrays::matrix<double> A(2, 2);
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A(i_, j_) << i_ + j_ / 2.0;
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std::cout << "A = " << A << std::endl;
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std::cout << "||A|| = " << frobenius_norm(A) << std::endl;
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}
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