Re: [ublas] Problem creating mapping from string to vector_expression

Subject: Re: [ublas] Problem creating mapping from string to vector_expression
From: SHIVAM MITTAL (2015csb1032_at_[hidden])
Date: 2017-03-30 14:21:59

I want the mapping to be vector_expressions only.  Using vector_expression
and not a real vector, means we can algorithmically build a data.frame from
the results of other computations.

On Thu, Mar 30, 2017 at 7:31 PM, Nasos Iliopoulos via ublas <
ublas_at_[hidden]> wrote:

> It would be kind of convolved to try to cast an ublas vector to a vector
> expression. Will the following achieve what you want?
>
>
> #include <boost/numeric/ublas/vector.hpp>
> #include <boost/numeric/ublas/io.hpp>
> #include <unordered_map>
> #include <string>
> #include <iostream>
>
>
> int main()
> {
>     std::unordered_map<std::string, boost::numeric::ublas::vector<int> >
> c;
>
>     boost::numeric::ublas::vector<int> v (10);
>     for (unsigned i = 0; i < v.size (); ++ i)
>         v (i) = i;
>
>     c["first"] = v;
>
>     std::cout << c["first"] << std::endl;
>     return 0;
> }
>
>
>
> On 03/30/2017 09:30 AM, SHIVAM MITTAL via ublas wrote:
>
> vector<int> v (10);
> for (unsigned i = 0; i < v.size (); ++ i)
> v (i) = i;
>
>
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>