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Questions tagged [boost-random]

The Boost Random Number Library (Boost.Random for short) provides a variety of generators and distributions to produce random numbers having useful properties, such as uniform distribution. Boost are free peer-reviewed portable C++ source libraries that work well with the C++ Standard Library.

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Consistent random number generation accross platforms with boost::random

We have been using boost::random for sometime now in our projects. Recently, a failing test unit got me intrigued about one of its properties: the sequence of numbers generated across different versions of Boost may be different, depending on the…
André Anjos
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boost::uniform_on_sphere suddenly fails after a few million correct realizations, but only on certain hosts

The Problem After correctly generating random vectors in 2 dimensions for a while, the boost::uniform_on_sphere distribution suddenly generates a vector with values -nan. I have tested the included program on three machines- the error was observed…
rngantner
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Is boost::random::discrete_distribution dynamically resizable?

I cannot find much documentation of the Boost version of discrete_distribution. After much Google searching, I still can't even find a list of methods that this class has, and whether any of them function to re-assign the probabilities. In my case,…
ely
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How bad rand from stdlib.h is?

I'm making a monte carlo simulation in C++ and I was using Boost for random numbers. I used GSL a bit too. But it turns out random number generation is one of my biggest runtime inefficiencies, so I just started using good old rand() from cstdlib.…
Rafael S. Calsaverini
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standard multivariate normal random vector using Boost::random

I would like to generate random points on a 2D surface, distributed around a x0, y0 coordinate. I understand that what I need to generate is called "standard multivariate normal random vector", but I don't know how to do it in C++, for example…
hyperknot
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boost::random and boost:uniform_real works with doubles not with floats?

Pardon me if this has been discussed already. I've got a template function which uses boost::uniform_int and boost::uniform_real depending on the template argument and should return the same type: template N getRandom(int min, int…
Ælex
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boost random in 2 dimensions

I am trying to use a boost random generator to make random points uniformly distributed over a plane surface. I have the following link for doing it in a single dimension: Boost random number generator Here they use boost::uniform_int<> to…
sekaran
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Getting integer random values instead of real values using boost::random library

I am trying to get real random values using boost::random libraries. This is my code: #include #include #include boost::random::mt19937 eng =…
Andry
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random number using Normal distrubution in C++

As explained by John, I tried this: #include std::tr1::mt19937 eng; // a core engine class std::tr1::normal_distribution dist; for (int i = 0; i < 10; ++i) std::cout << dist(eng) << std::endl; But I am getting…
Kaushik Acharya
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Initializing a member class of an object using a non-default constructor in C++

I have a specific situation where I've got an object that I want to use the boost random number generators on, and it has lead to a greater question which I cannot seem to answer. Here is the example code of what I'm trying to produce. First, my…
Avacar
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Boost random numbers - weird compilation error

In a simulation I'm writing I have a class that represents an Agent that must take some actions and I want this agent to have access to a random number generator. I heard boost rng's where good ones, so I wanted to learn how to use them. So, here's…
Rafael S. Calsaverini
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How do I use Boost Random

I need to generate random number with Boost Random. I tried to follow the general guide. I extracted the files of the library. So if I want to use the classes and objectj of the library how I should do? First I know including the library in the…
Andrea Angeletti
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Undefined reference to boost::random::random_device constructor and destructor on MinGW-w64 gcc

My OS is Windows 7 64-bit and C++ compiler I'm using is: g++ (i686-posix-dwarf-rev0, Built by MinGW-W64 project) 5.3.0 And I installed Boost version 1.60 using: bootstrap.bat mingw b2 install target=gcc Then I tested is it working, using examples…
Toreno96
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How to reset Boost::variate_generator distribution?

I am trying to write a function that takes in a min and a max and returns a random double between them. I was trying to use Boost::variate_generator to get a random number between two doubles, but the issue is that I can't change the distribution on…
user947871
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Issue when shuffling a vector with boost::random

I am using this code to generate a random permutation of a vector using a variation of Fisher-Yates randomization algorithm (I am going from the first element to the last, not the other way around). I am using a boost::random::mt11213b RNG globally…
user267885
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