eigen Questions
1
I'm using RcppEigen to write some C++ functions for my R code, and I'd like to optimize their compilation as much as possible. When I've used Eigen in the past, I've gotten a significant boost from...
3
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I need to access the array that contains the data of a MatrixBase Eigen matrix.
The Eigen library has the data() method which returns a pointer to an array, however it is only accessible from a Ma...
1
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I am using m.conservativeResize() to do the equivalent in Eigen as the reshape function in MatLab. So let N = 3, and then...
static MatrixXd m(N*N,1);
and then I assign this matrix some values, ...
2
I would like to compare the speed of Matlab in matrix multiplication with the speed of Eigen 3 on an Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz. The code including Eigen:
#include <iostream>
#i...
3
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Is it possible to create a vector of Eigen Matrix?
For example, I run the following line,
vector<Matrix<double,4,1>> vector_of_matrix;
but I receive the following error,
error: tem...
2
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1
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We want to implement some kind of indoor position determination using iBeacons.
This article seems really interesting, in which the author implemented the Non-linear Least Squares Triangulation, us...
Barstow asked 10/11, 2014 at 17:42
1
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I'm writing a C++ function that is templated on type (either float or double), and uses Eigen::Matrix internally. The function will be using a combination of float, double, and templated type Eigen...
1
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Is there a ready function or method in Eigen for the Hat operator? That is the operator, taking a vector as input and returning a matrix, which mimics a cross product with that vector. I know, that...
Ruffina asked 1/10, 2014 at 8:2
3
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Here's a part of Eigen documentation:
Matrix3f m;
m << 1, 2, 3,
4, 5, 6,
7, 8, 9;
std::cout << m;
Output:
1 2 3
4 5 6
7 8 9
I couldn't understand how could all the comma separat...
Figuration asked 8/4, 2015 at 18:58
1
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Is there a more elegant solution than to copy the values point to point?!
Something like this works for a 1D vector...
vector<float> vec(mat.data(), mat.data() + mat.rows() * mat.cols());
...
Evanesce asked 24/3, 2015 at 20:40
1
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We are trying to implement a new C++ code in my research group to perform large numerical simulations (finite elements, finite difference methods, topology optimization, etc.) The software will be ...
Ellingston asked 10/3, 2015 at 16:9
2
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I am trying to generate a PCL point cloud. All my points are in the following container type:
std::vector<Eigen::Vector3d,Eigen::aligned_allocator<Eigen::Vector3d> >
I would like to ...
Feudalize asked 15/6, 2013 at 23:55
1
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I am trying to do some L_p norm calculations within a template function something of the sort
template<typename Number>
Number foo(const Eigen::MatrixBase<Number>& matrix)
{
retur...
1
I like to place Eigen fixed-size matrices into the shared memory.
But on execution I am getting the following error:
/usr/include/eigen3/Eigen/src/Core/DenseStorage.h:78:
Eigen::internal::plain_...
Australoid asked 21/1, 2015 at 11:36
2
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I'm trying to utilize the ODE integration capabilities of Boost using the Matrix class from Eigen 3 as my state vector, but I'm running into problems deep into Boost that I don't understand how to ...
Latitudinarian asked 1/4, 2014 at 9:47
1
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It's quite a simple task, but I was not able to find an answer to it:
Using the Eigen library, suppose I have Matrix2Xd mat and Vector2d vec, where
mat = 1 1 1
1 1 1
vec = 2 2
Now I need somet...
1
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I am trying to compile this code in XCode 6:
std::unordered_multimap< Frame*, Sim3, std::hash<Frame*>, std::equal_to<Frame*>, Eigen::aligned_allocator< std::pair<const Frame*,...
4
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I am trying to take the cholesky decomposition of the product of a matrix with its transpose, using Eigen and C++11 "auto" type. The problem comes when I try to do
auto c = a * b
auto cTc = c.tra...
2
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I am trying to initialize a matrix (using the Eigen library) to have a nonzero value when I create it. Is there a nice way to do this without a for loop?
For example, if I wanted to initialize the...
1
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I have couple of question about Eigen:
Does anyone know if there is any plan to support move semantics in Eigen anytime soon? Couldn't find anything on the TODO list of the Eigen3 web page. Right...
2
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I have the following piece of code (I apologize for the slightly larger code
snippet, this is the minimal example I was able to reduce my problem to):
#include <Eigen/Dense>
#include <com...
1
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I am working on a C project I got from the Internet, and I'm trying to add some functions to the project that involve linear algebra. In my previous works in C++, I usually rely on Eigen for linear...
0
I'm trying to use the Eigen implementation of Levenberg Marquardt algorithm on a Android application. In order to use Eigen, I'm using Android NDK and jni. I've already tested Eigen with simple cal...
Arman asked 28/10, 2014 at 18:21
3
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I need to optimize a surface represented by a 2D grid of points to produce normal vectors of the surface that align with provided target normal vectors. The grid size is likely to be between 201x20...
Yolandoyolane asked 13/10, 2014 at 8:47
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