How can I know the index of the first non-zero element in a sparse_vector in 开发者_运维问答ublas and each subsequent nonzero element as well? The function begin() gives me an iterator that can be use
Is there a way to create an array of ublas c_vectors with different sizes? For example array[0] would return an ublas::c_vector< double, 3 > (size=3) and array[0](0) would access its first ele
I am a bit perplexed by the Boost ublas documentation.It does not seem clear to me that the sparse and dense matrix classes share a common parent class---which I believe is by design.But then how can
How do I apply level 1 blas on a boost::numeric::ublas matrix? For example I want t开发者_开发问答o compute the maximum entry or the sum of all entries.
I\'m trying to implement a three dimensional tensor using uBlas matrix from boost as a backend. One of the function is getting a reference to a slice and enables an easy assignment of matrix.
How can I map a function to every element of a vector in uBLAS (开发者_Python百科like Map[] in Mathematica)?
This has been puzzling me for a few hours, so maybe someone here can help. I am trying to translate the following simple Matlab program into C++ using uBLAS:
If I开发者_如何学编程 have n vectors of length m and want to join them to create an mxn matrix, what is the most efficient way to do this in C++ using Boost uBLAS?
I\'m converting some of my own vector algebra code to use the optimized boost uBLAS library. However, when I tried to do a SymmetricMatrix-SparseVector multiplication I found it to be about 4x slower
How do boost::numeric::ublas::vector and std::vector compare in runtime efficiency? Is it safe to assume that I can convert an entire program from using std::vector to use boost::numeric::ublas::vect
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