Difference between revisions of "cpp/numeric/random/piecewise linear distribution"
From cppreference.com
m (Text replace - "{{mark c++11 feature}}" to "{{mark since c++11}}") |
(+example) |
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| Line 39: | Line 39: | ||
{{example cpp | {{example cpp | ||
| code= | | code= | ||
| + | #include <iostream> | ||
| + | #include <iomanip> | ||
| + | #include <string> | ||
| + | #include <map> | ||
| + | #include <random> | ||
| + | int main() | ||
| + | { | ||
| + | std::random_device rd; | ||
| + | std::mt19937 gen(rd()); | ||
| + | // increase the probability from 0 to 5 | ||
| + | // remain flat from 5 to 10 | ||
| + | // decrease from 10 to 15 at the same rate | ||
| + | std::vector<double> i{0, 5, 10, 15}; | ||
| + | std::vector<double> w{0, 1, 1, 0}; | ||
| + | std::piecewise_linear_distribution<> d(i.begin(), i.end(), w.begin()); | ||
| + | |||
| + | std::map<int, int> hist; | ||
| + | for(int n=0; n<10000; ++n) | ||
| + | ++hist[d(gen)]; | ||
| + | for(auto p : hist) | ||
| + | std::cout << std::setw(2) << p.first << ' ' << std::string(p.second/100, | ||
| + | } | ||
| output= | | output= | ||
| + | 0 * | ||
| + | 1 *** | ||
| + | 2 **** | ||
| + | 3 ****** | ||
| + | 4 ********* | ||
| + | 5 ********* | ||
| + | 6 ********* | ||
| + | 7 ********** | ||
| + | 8 ********* | ||
| + | 9 ********** | ||
| + | 10 ********* | ||
| + | 11 ******* | ||
| + | 12 **** | ||
| + | 13 *** | ||
| + | 14 * | ||
}} | }} | ||
Revision as of 10:32, 19 January 2012
Template:cpp/numeric/random/piecewise linear distribution/sidebar
| Defined in header <random>
|
||
| template< class RealType = double > class piecewise_linear_distribution; |
(since C++11) | |
| This section is incomplete |
Contents |
Member types
Template:tdcl list begin Template:tdcl list hitem Template:tdcl list item Template:tdcl list item Template:tdcl list end
