Struct CsrMatrixView 

pub struct CsrMatrixView<'a, T>(/* private fields */);

An immutable view of a CSR matrix.

This provides efficient read-only access to CSR matrix data without allocation. Views are commonly used for matrix operations and can be easily created from both mutable and immutable CSR matrices.

Examples

use algebra_sparse::{CsrMatrix, CsrMatrixViewMethods};
use nalgebra::DMatrix;

let dense = DMatrix::from_row_slice(2, 2, &[1.0, 2.0, 3.0, 4.0]);
let csr = CsrMatrix::from_dense(dense.as_view());
let view = csr.as_view();

println!("Number of rows: {}", view.nrows());
println!("Number of columns: {}", view.ncols());

Implementations

impl<'a, T> CsrMatrixView<'a, T>

pub fn from_parts_unchecked( row_offsets: &'a [usize], col_indices: &'a [usize], values: &'a [T], ncol: usize, ) -> Self

Creates a CsrMatrixView from raw parts without checking validity.

Safety

This function does not validate that the provided parts form a valid CSR matrix. Invalid parts may cause undefined behavior when accessing the matrix.

Arguments

• row_offsets - Row offset array (length = nrows + 1)
• col_indices - Column index array for non-zero elements
• values - Non-zero values array
• ncol - Number of columns

impl<'a, T> CsrMatrixView<'a, T>

where T: Real,

pub fn dense_rate(&self) -> f32

Returns the density rate of the matrix.

This is the ratio of non-zero elements to total elements. A value of 0.1 means 10% of elements are non-zero.

pub fn transpose(&self) -> CscMatrixView<'a, T>

Transposes the CSR matrix view to a CSC matrix view.

This is a zero-cost operation that only changes the interpretation of the data. No data is copied or moved.

Returns

A CSC view of the same matrix data

pub fn shape(&self) -> (usize, usize)

Returns the shape of the matrix as (nrows, ncols).

pub fn nrows(&self) -> usize

Returns the number of rows in the matrix.

pub fn ncols(&self) -> usize

Returns the number of columns in the matrix.

pub fn get_row(self, row_index: usize) -> CsVecRef<'a, T>

Gets a row as a sparse vector.

Arguments

• row_index - Index of the row to retrieve

Returns

A CsVecRef representing the sparse vector for this row

Trait Implementations

impl<'a, T: Clone> Clone for CsrMatrixView<'a, T>

fn clone(&self) -> CsrMatrixView<'a, T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, T: Debug> Debug for CsrMatrixView<'a, T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'b, T> IntoView for &CsrMatrixView<'b, T>

where T: Copy,

type View = CsrMatrixView<'b, T>

The view type produced by this trait.

fn into_view(self) -> Self::View

Converts the type into an immutable view.

impl<'a, T> IntoView for CsrMatrixView<'a, T>

type View = CsrMatrixView<'a, T>

The view type produced by this trait.

fn into_view(self) -> Self::View

Converts the type into an immutable view.

impl<'a, T: Real> Mul<CscMatrixView<'a, T>> for CsrMatrixView<'a, T>

type Output = CsrMatrix<T>

The resulting type after applying the * operator.

fn mul(self, rhs: CscMatrixView<'a, T>) -> Self::Output

Performs the * operation.

impl<'a, T: Real> Mul<DiagonalBlockMatrixView<'a, T>> for CsrMatrixView<'a, T>

type Output = CsrMatrix<T>

The resulting type after applying the * operator.

fn mul(self, rhs: DiagonalBlockMatrixView<'a, T>) -> Self::Output

Performs the * operation.

impl<'a, T: Real> Mul<Matrix<T, Dyn, Const<1>, VecStorage<T, Dyn, Const<1>>>> for CsrMatrixView<'a, T>

type Output = Matrix<T, Dyn, Const<1>, VecStorage<T, Dyn, Const<1>>>

The resulting type after applying the * operator.

fn mul(self, rhs: DVector<T>) -> Self::Output

Performs the * operation.

impl<'a, T: Real> Mul<Matrix<T, Dyn, Const<1>, ViewStorage<'a, T, Dyn, Const<1>, Const<1>, Dyn>>> for CsrMatrixView<'a, T>

type Output = Matrix<T, Dyn, Const<1>, VecStorage<T, Dyn, Const<1>>>

The resulting type after applying the * operator.

fn mul(self, rhs: DVectorView<'a, T>) -> Self::Output

Performs the * operation.

impl<'a, T: Real> Mul<Matrix<T, Dyn, Dyn, ViewStorage<'a, T, Dyn, Dyn, Const<1>, Dyn>>> for CsrMatrixView<'a, T>

type Output = CsrMatrix<T>

The resulting type after applying the * operator.

fn mul(self, rhs: DMatrixView<'a, T>) -> Self::Output

Performs the * operation.

impl<'a, T: Copy> Copy for CsrMatrixView<'a, T>