ublas_开发者

Accessing the indices of non-zero elements in a UBLAS sparse vector

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[详细]

2023-04-06 05:56 分类：问答

c++ and ublas: creating an array of c_vectors with different sizes

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[详细]

2023-04-06 03:48 分类：问答

API that handles boost ublas sparse OR dense matrices

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[详细]

2023-04-02 00:10 分类：问答

Applying Boost UBLAS blas-1 to Matrices

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.[详细]

2023-03-31 03:30 分类：问答

Why compiler choose the const method instead of non-const?

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.[详细]

2023-03-31 01:55 分类：问答

Performing STL operations on Boost::uBLAS vectors

How can I map a function to every element of a vector in uBLAS (开发者_Python百科like Map[] in Mathematica)?[详细]

2023-03-27 22:49 分类：问答

Newbie question regarding submatrix manipulation using BOOST uBLAS

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:[详细]

2023-03-24 22:24 分类：问答

Creating a matrix from vectors in C++ with 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?[详细]

2023-03-14 13:12 分类：问答

uBLAS Slow Matrix-SparseVector Multiplication

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[详细]

2023-03-13 03:02 分类：问答

Boost vectors versus STL vectors

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[详细]

2023-03-11 22:53 分类：问答