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Questions tagged [ublas]

uBLAS is a C++ template class library that provides BLAS level 1, 2, 3 functionality for dense, packed and sparse matrices.

uBLAS is a C++ template class library that provides BLAS level 1, 2, 3 functionality for dense, packed and sparse matrices. The design and implementation unify mathematical notation via operator overloading and efficient code generation via expression templates.

http://www.boost.org/doc/libs/release/libs/numeric

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Ublas vector initialization outside of function

I would like to declare a specific boost ublas vector as global variable. The problem is that declaration outside of a function always leads to an error. Here is a specific example: The following code will give multiple errors: (error C2143: syntax…
user2306172
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How to understand and fix recursive template instantiation error using boost ublas?

I'm receiving a compiler error /Developer/boost/boost/numeric/ublas/expression_types.hpp:184:16: fatal error: recursive template instantiation exceeded maximum depth of 512 from clang++ or indefinite compiling with >10GB memory usage from g++…
NoahR
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How can I calculate a quadratic form using Boost UBLAS?

I am trying to calculate (x-mu)^T*SigmaInverse*(x-mu) using Boost UBLAS, where x and mu are vectors and SigmaInverse is a Matrix. The code looks like this: #include #include #include…
Grzenio
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C++ Question about Boost UBLAS

Does the Boost UBLAS library have a built-in solver for solving systems of equations? The documentation implies that all the ublas solver routines require the matrix to already be in triangular form. But, if a matrix is not in triangular form, is…
Charles Salvia
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Is there an advantage to using pointers or references to return Boost matrices?

I'm using Boost to do some matrix algebra. I'm trying to understand if this optimization does anything. Original: matrix DoSomething(matrix a, matrix b) { return a + b; //for example } Optimization: matrix*…
beerncircus
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How do I stream a file into a matrix in C++ boost ublas?

I'm trying to read in a file that contains matrix data into a boost matrix. "" is already supposed to have operator overloads for this sort of thing and I can get it to write to a standard stream (cout). I don't know what's wrong with going the…
beerncircus
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What is the difference between project and subrange functions in boost::number::ublas?

Ie, is there any difference between subrange(V, 0, 3); and project(V, range(0,3)); ? I ask because I'm digging into some code that seems to use both forms (with no apparent rhyme/reason for one vs. the other), but I can't see any difference…
Paul Molodowitch
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How do I use zero_vector to initialize in boost / c++?

I was looking at one of the answers to: filling a boost vector or matrix but I think I'm new to boost(and xcode, for that matter) and am trying to wrap my head around the boost zero_vector. I tried a simple program that I thought was about the same…
Steve Hwan
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define a boost::ublas matrix with a given vector

I am looking for a way to define a nxm matrix from a given 1xm vector in boost::ublas. I try the following code boost::numeric::ublas::vector v(100); boost::numeric::ublas::matrix m(10, 100); std::copy(v.begin(), v.end(),…
user1285419
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