<div>Hi</div>
<div>&nbsp;</div>
<div>I want to declare a new vector &quot;new_vec&quot; at the same size as an existing vector &quot;vec&quot;.</div>
<div>I tried to use:</div>
<div>&nbsp;</div>
<div>vector&lt;float&gt; new_vec(vec.size);</div>
<div>&nbsp;</div>
<div>but I got the following error:</div>
<div>&nbsp;</div>
<div>test_b3.cpp:19: error: no matching function for call to `boost::numeric::ublas::vector&lt;float, boost::numeric::ublas::unbounded_array&lt;float, std::allocator&lt;float&gt; &gt; &gt;::vector(&lt;unknown type&gt;)'<br>
../boost/boost/numeric/ublas/vector.hpp:66: note: candidates are: boost::numeric::ublas::vector&lt;T, A&gt;::vector(const boost::numeric::ublas::vector&lt;T, A&gt;&amp;) [with T = float, A = boost::numeric::ublas::unbounded_array&lt;float, std::allocator&lt;float&gt; &gt;]
<br>../boost/boost/numeric/ublas/vector.hpp:62: note:&nbsp; boost::numeric::ublas::vector&lt;T, A&gt;::vector(typename A::size_type, const A&amp;) [with T = float, A = boost::numeric::ublas::unbounded_array&lt;float, std::allocator&lt;float&gt; &gt;]
<br>../boost/boost/numeric/ublas/vector.hpp:57: note:&nbsp; boost::numeric::ublas::vector&lt;T, A&gt;::vector(typename A::size_type) [with T = float, A = boost::numeric::ublas::unbounded_array&lt;float, std::allocator&lt;float&gt; &gt;]
<br>../boost/boost/numeric/ublas/vector.hpp:53: note:&nbsp; boost::numeric::ublas::vector&lt;T, A&gt;::vector() [with T = float, A = boost::numeric::ublas::unbounded_array&lt;float, std::allocator&lt;float&gt; &gt;]<br>&nbsp;</div>

<div>Thanks for your help.</div>
<div>&nbsp;</div>
<div>Dvir.</div>