48 lines
1.2 KiB
C++
48 lines
1.2 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_custom_modified_axis
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#include <boost/histogram.hpp>
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#include <cassert>
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#include <iostream>
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#include <sstream>
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int main() {
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using namespace boost::histogram;
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// custom axis, which adapts builtin integer axis
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struct custom_axis : public axis::integer<> {
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using value_type = const char*; // type that is fed to the axis
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using integer::integer; // inherit ctors of base
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// the customization point
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// - accept const char* and convert to int
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// - then call index method of base class
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axis::index_type index(value_type s) const { return integer::index(std::atoi(s)); }
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};
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auto h = make_histogram(custom_axis(3, 6));
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h("-10");
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h("3");
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h("4");
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h("9");
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std::ostringstream os;
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for (auto&& b : indexed(h)) {
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os << "bin " << b.index() << " [" << b.bin() << "] " << *b << "\n";
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}
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std::cout << os.str() << std::endl;
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assert(os.str() == "bin 0 [3] 1\n"
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"bin 1 [4] 1\n"
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"bin 2 [5] 0\n");
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}
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//]
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