在C ++中为boost :: numeric :: ublas :: vector分配多个值 [英] assign multiple values to boost::numeric::ublas::vector in c++

问题描述

我想知道如何一次将多个值分配给向量:

I want to know how I can assign multiple values to a vector at once:

#include <iostream>
#include <boost/numeric/ublas/vector.hpp>
#include <boost/numeric/ublas/io.hpp>

using namespace boost::numeric::ublas;

int main()
{
    vector<double> v1(3);
    v1(0)=0;
    v1(1)=0.1;
    v1(2)=0.05;
    v1(3)=0.25;

    return 0;
}

我想一次分配所有值. 像这样:

I want to assign all the values at once. something like:

v1 << 0,0.1,0.05,0.25;

我尝试了运算符+ =，但有一个错误，但我认为运算符+ =适用于std :: vector而不是boost :: .... vector

I tried operator += and there is an error, but I think operator += works for std::vector not boost::....vector

推荐答案

看看文档示例基本上，您需要v1 <<= 0, 1, 2;，请参阅文档中的更多示例.不幸的是，该库尚不支持initializer_list: http ://boost.2283326.n4.nabble.com/Initializing-from-an-initializer-list-td4647029.html

Basically, you need v1 <<= 0, 1, 2;, see more examples in the docs. Unfortunately this library doesn't support initializer_list's yet: http://boost.2283326.n4.nabble.com/Initializing-from-an-initializer-list-td4647029.html

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