Struct CscMatrixView 

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

Compressed Sparse Column (CSC) Matrix View.

CSC format is optimized for column-wise operations and is the transpose of CSR format. It stores non-zero elements column by column, making it efficient for:

• Column access and iteration
• Column-based computations
• Matrix operations that benefit from column-wise access

This is a view type that provides efficient read-only access to matrix data without allocation.

Examples

use algebra_sparse::CsrMatrix;
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 csc = csr.as_view().transpose();

// Access columns
for col_idx in 0..csc.ncols() {
    let col = csc.get_col(col_idx);
    for (row, val) in col.iter() {
        println!("({}, {})", row, val);
    }
}

Implementations

impl<'a, T> CscMatrixView<'a, T>

where T: Real,

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_col(&self, col_index: usize) -> CsVecRef<'a, T>

Gets a column as a sparse vector.

Arguments

• col_index - Index of the column to retrieve

Returns

A CsVecRef representing the sparse vector for this column

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

Transposes to a CsrMatrixView.

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

Returns

A CSR view of the same matrix data

pub fn to_dense(&self) -> DMatrix<T>

Converts to a dense matrix.

This allocates a new dense matrix and copies all non-zero elements.

Returns

A dense DMatrix containing the same data

Trait Implementations

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

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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<Matrix<T, Dyn, Const<1>, ViewStorage<'a, T, Dyn, Const<1>, Const<1>, Dyn>>> for CscMatrixView<'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: Copy> Copy for CscMatrixView<'a, T>