nalgebra is a linear algebra library written for Rust
nalgebra is a linear algebra library written for Rust targeting:
General-purpose linear algebra (still lacks a lot of features…)
Real-time computer graphics.
Real-time computer physics.
Questions tagged [nalgebra]
43 questions
3
votes
0 answers
How to Append matrices together in nalgebra Rust?
Suppose I have a matrix [[1,0],[0,1]] and [[2,0],[0,2]] I want to figure out a way to combine these 2 matrices into [[1,0,2,0],[0,1,0,2]]. I cannot find the appropriate constructor in the documentation:…
GingerGengar123
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- 2
3
votes
0 answers
Rust trait bound bloat / lack of inheritance
I'm trying to wrap the nalgebra and/or ndarray Rust crates into an abstract LinearOperator trait and corresponding AdjointableOperator etc. traits. The problem is that I get significant “trait bound bloat”, having to specify even internal…
497e0bdf29873
- 191
- 5
3
votes
3 answers
How do I create an nalgebra static matrix by copying from a dynamic matrix view?
I'm trying to create a na::Matrix2x3 by copying from the first two rows of a na::Matrix3. The result will be stored in a struct.
I don't know how to do this and the documentation is confusing. I tried clone(), into(), from(...), etc., but nothing…
Daniel
- 510
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- 15
3
votes
2 answers
Extract original slice from SliceStorage and SliceStorageMut
I am working on some software where I am managing a buffer of floats in a Vec where T is either an f32 or f64. I sometimes need to interpret this buffer, or sections of it, as a mathematical vector. To this end, I am taking advantage of…
Wil
- 115
- 6
2
votes
1 answer
Error multiplying matrix by vector with generic sizing using nalgebra
Running into what seems like an odd issue when trying to multiply a square matrix A with X rows and X columns by a vector x with X rows, constructed from a struct with generic sizing. Just a basic A*x = b operation. The end goal is to have a struct…
LivyAndLetLive
- 21
- 4
2
votes
1 answer
rust nalgebra, how to modify a matrix block?
I am using nalgebra and trying to do the following:
Given a large dense amtrix, e.g. a 5x5. I want to grab a block of that matrix, e.e.g a 4x5 sublock, and treat that block as a matrix. I want to perform scalar multiplication and vector addition on…
Makogan
- 8,208
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2
votes
1 answer
Why is Rust unable to figure out the correct `from_iterator` to use when constructing a nalgebra::MatrixN?
I have a struct defined as:
use nalgebra::{
allocator::Allocator, DefaultAllocator, Dim, DimName, MatrixN, RowVectorN, VectorN, U1,
}; // 0.22.0
pub struct Filter
where
DefaultAllocator:
Allocator
Tim
- 4,560
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- 40
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2
votes
1 answer
nalgebra: Implementing a function for a generic MatrixMN
I'm trying to implement the exp function for a generic square MatrixMN
pub fn exp(m: &MatrixMN, k: usize) -> MatrixMN
where
N: Scalar + One + Zero,
R: DimName + DimNameAdd,
::Value: Mul<
Fredrik Jansson
- 3,764
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1
vote
1 answer
How to assign the column of one matrix to another, nalgebra?
I am using nalgebra and I want to modify one matrix by setting it as the columns of another with compatible dimensions, like this:
let zero: T = convert(0.0);
let mut basis = DMatrix::from_element(rows, rank, zero);
// matrix is an input…
Makogan
- 8,208
- 7
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1
vote
1 answer
nalgebra type annotations for converting Matrix to DMatrix
I'm trying to convert a static matrix into a dynamic matrix using a function. Reason being is that I'm comparing two matrices for unit-testing. Thus the test_value from the test, and the benchmark matrices have to be the same element wise. They will…
dim_voly
- 478
- 2
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1
vote
0 answers
Use nalgebra with float types from rug
Is it possible to replace the rust f64 fundamental type with rug::Float types?
If so, which traits must be implemented in order to call svd() on a nalgebra matrix?
1
vote
0 answers
Calculate matrix null space through rust nalgebra library
How can I get the basis of the null space (kernel) of a matrix through the rust nalgebra lib?
GeauxEric
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1
vote
0 answers
Nalgerba, how is the axis angle represented for a unit quaternion?
The docs for nalgebra say
fn new(axisangle: Vector3) -> UnitQuaternion[−]
Creates a new unit quaternion from the axis-angle representation of a rotation.
That's great, except, that's not an axis angle, that's just an axis. Most axis angle…
Makogan
- 8,208
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1
vote
0 answers
Compiler does not believe that my trait bound is enforcing the trait that it has to be enforcing
I am trying to compile code such as the following:
lib.rs
use nalgebra::ComplexField;
use num::FromPrimitive;
use bacon_sci::polynomial;
use bacon_sci::polynomial::Polynomial;
fn foo () -> Polynomial
where
R: FromPrimitive +…
Zistack
- 516
- 3
- 10
1
vote
2 answers
How do I reduce repeated generic specification?
In this example, I repeat na::SVector a bunch, can I define a type
type StateVector = na::SVector;
like this? I get an error that associated type defaults are unstable. Is there another way?
use nalgebra as na;
pub…
Matt Oslin
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