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// Copyright 2015-2018 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)
//[ guide_histogram_streaming
#include <boost/histogram.hpp>
#include <boost/histogram/ostream.hpp>
#include <cassert>
#include <iostream>
#include <sstream>
#include <string>
int main() {
using namespace boost::histogram;
std::ostringstream os;
auto h1 = make_histogram(axis::regular<>(5, -1.0, 1.0, "axis 1"));
h1.at(0) = 2;
h1.at(1) = 4;
h1.at(2) = 3;
h1.at(4) = 1;
// 1D histograms are rendered as an ASCII drawing
os << h1;
auto h2 = make_histogram(axis::regular<>(2, -1.0, 1.0, "axis 1"),
axis::category<std::string>({"red", "blue"}, "axis 2"));
// higher dimensional histograms just have their cell counts listed
os << h2;
std::cout << os.str() << std::endl;
assert(
os.str() ==
"histogram(regular(5, -1, 1, metadata=\"axis 1\", options=underflow | overflow))\n"
" +-------------------------------------------------------------+\n"
"[-inf, -1) 0 | |\n"
"[ -1, -0.6) 2 |============================== |\n"
"[-0.6, -0.2) 4 |============================================================ |\n"
"[-0.2, 0.2) 3 |============================================= |\n"
"[ 0.2, 0.6) 0 | |\n"
"[ 0.6, 1) 1 |=============== |\n"
"[ 1, inf) 0 | |\n"
" +-------------------------------------------------------------+\n"
"histogram(\n"
" regular(2, -1, 1, metadata=\"axis 1\", options=underflow | overflow)\n"
" category(\"red\", \"blue\", metadata=\"axis 2\", options=overflow)\n"
" (-1 0): 0 ( 0 0): 0 ( 1 0): 0 ( 2 0): 0 (-1 1): 0 ( 0 1): 0\n"
" ( 1 1): 0 ( 2 1): 0 (-1 2): 0 ( 0 2): 0 ( 1 2): 0 ( 2 2): 0\n"
")");
}
//]
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