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- // Copyright 2018 Hans Dembinski
- //
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt
- // or copy at http://www.boost.org/LICENSE_1_0.txt)
- // clang-format off
- //[ getting_started_listing_03
- #include <boost/format.hpp>
- #include <boost/histogram.hpp>
- #include <cassert>
- #include <iostream>
- #include <sstream>
- int main() {
- using namespace boost::histogram;
- /*
- Create a profile. Profiles does not only count entries in each cell, but
- also compute the mean of a sample value in each cell.
- */
- auto p = make_profile(axis::regular<>(5, 0.0, 1.0));
- /*
- Fill profile with data, usually this happens in a loop. You pass the sample
- with the `sample` helper function. The sample can be the first or last
- argument.
- */
- p(0.1, sample(1));
- p(0.15, sample(3));
- p(0.2, sample(4));
- p(0.9, sample(5));
- /*
- Iterate over bins and print profile.
- */
- std::ostringstream os;
- for (auto&& x : indexed(p)) {
- os << boost::format("bin %i [%3.1f, %3.1f) count %i mean %g\n")
- % x.index() % x.bin().lower() % x.bin().upper()
- % x->count() % x->value();
- }
- std::cout << os.str() << std::flush;
- assert(os.str() == "bin 0 [0.0, 0.2) count 2 mean 2\n"
- "bin 1 [0.2, 0.4) count 1 mean 4\n"
- "bin 2 [0.4, 0.6) count 0 mean 0\n"
- "bin 3 [0.6, 0.8) count 0 mean 0\n"
- "bin 4 [0.8, 1.0) count 1 mean 5\n");
- }
- //]
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