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4a2e3db0e0
* renaming naked to remove_cvref_t * more static_asserts to check implicit conditions * use new BOOST_TEST_TRAIT_SAME * reorganize and add operator tests, fixes for array and map adaptors * improved map adaptor * storage does not have to support scaling operator anymore * doc improvements
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright 2015-2018 Hans Dembinski
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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//[ guide_make_dynamic_histogram
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#include <boost/histogram.hpp>
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#include <boost/lexical_cast.hpp> // convert strings to numbers
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#include <cassert>
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#include <vector>
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namespace bh = boost::histogram;
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int main(int argc, char** argv) {
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// read axis config from command-line: [nbins start stop] ...
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// and create vector of regular axes, the number of axis is not known at compile-time
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assert((argc - 1) % 3 == 0);
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auto v1 = std::vector<bh::axis::regular<>>();
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for (int iarg = 1; iarg < argc;) {
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const auto bins = boost::lexical_cast<unsigned>(argv[iarg++]);
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const auto start = boost::lexical_cast<double>(argv[iarg++]);
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const auto stop = boost::lexical_cast<double>(argv[iarg++]);
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v1.emplace_back(bins, start, stop);
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}
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// create dynamic histogram from iterator range
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// (copying or moving the vector also works, move is shown below)
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auto h1 = bh::make_histogram(v1.begin(), v1.end());
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assert(h1.rank() == v1.size());
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// create second vector of axis::variant, a polymorphic axis type that can hold concrete
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// axis types, the types and the number of axis can now vary at run-time
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auto v2 = std::vector<bh::axis::variant<bh::axis::regular<>, bh::axis::integer<>>>();
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v2.emplace_back(bh::axis::regular<>(100, -1.0, 1.0));
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v2.emplace_back(bh::axis::integer<>(1, 7));
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// create dynamic histogram by moving the vector
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auto h2 = bh::make_histogram(std::move(v2));
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assert(h2.rank() == 2);
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}
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//]
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