63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// Copyright 2019 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
|
|
|
|
//[ guide_axis_growing
|
|
|
|
#include <boost/histogram.hpp>
|
|
#include <cassert>
|
|
|
|
#include <iostream>
|
|
|
|
int main() {
|
|
using namespace boost::histogram;
|
|
|
|
// make a growing regular axis
|
|
// - it grows new bins with its constant bin width until the value is covered
|
|
auto h1 = make_histogram(axis::regular<double,
|
|
use_default,
|
|
use_default,
|
|
axis::option::growth_t>{2, 0., 1.});
|
|
// nothing special happens here
|
|
h1(0.1);
|
|
h1(0.9);
|
|
// state: [0, 0.5): 1, [0.5, 1.0): 1
|
|
assert(h1.axis().size() == 2);
|
|
assert(h1.axis().bin(0).lower() == 0.0);
|
|
assert(h1.axis().bin(1).upper() == 1.0);
|
|
|
|
// value below range: axis grows new bins until value is in range
|
|
h1(-0.3);
|
|
// state: [-0.5, 0.0): 1, [0, 0.5): 1, [0.5, 1.0): 1
|
|
assert(h1.axis().size() == 3);
|
|
assert(h1.axis().bin(0).lower() == -0.5);
|
|
assert(h1.axis().bin(2).upper() == 1.0);
|
|
|
|
h1(1.9);
|
|
// state: [-0.5, 0.0): 1, [0, 0.5): 1, [0.5, 1.0): 1, [1.0, 1.5): 0 [1.5, 2.0): 1
|
|
assert(h1.axis().size() == 5);
|
|
assert(h1.axis().bin(0).lower() == -0.5);
|
|
assert(h1.axis().bin(4).upper() == 2.0);
|
|
|
|
// make a growing category axis (here strings)
|
|
// - empty axis is allowed: very useful if categories are not known at the beginning
|
|
auto h2 = make_histogram(axis::category<std::string,
|
|
use_default,
|
|
axis::option::growth_t>());
|
|
assert(h2.size() == 0); // histogram is empty
|
|
h2("foo"); // new bin foo, index 0
|
|
assert(h2.size() == 1);
|
|
h2("bar"); // new bin bar, index 1
|
|
assert(h2.size() == 2);
|
|
h2("foo");
|
|
assert(h2.size() == 2);
|
|
assert(h2[0] == 2);
|
|
assert(h2[1] == 1);
|
|
}
|
|
|
|
//]
|