Struct CSCStorage 

pub struct CSCStorage {
    pub values: Vec<Precision>,
    pub row_indices: Vec<IndexType>,
    pub col_ptr: Vec<IndexType>,
}

Compressed Sparse Column (CSC) storage format.

Efficient for column-wise operations.

Fields

values: Vec<Precision>

Non-zero values in column-major order

row_indices: Vec<IndexType>

Row indices corresponding to values

col_ptr: Vec<IndexType>

Column pointers: col_ptr[j] is the start of column j in values/row_indices

Implementations

impl CSCStorage

pub fn from_coo( coo: &COOStorage, rows: DimensionType, cols: DimensionType, ) -> Result<Self>

Create CSC storage from COO format.

pub fn from_csr( csr: &CSRStorage, rows: DimensionType, cols: DimensionType, ) -> Result<Self>

Create CSC storage from CSR format.

pub fn get(&self, row: usize, col: usize) -> Option<Precision>

Get matrix element at (row, col).

pub fn row_iter(&self, row: usize) -> CSCRowIter<'_>

Iterate over non-zero elements in a row (slow for CSC).

pub fn col_iter(&self, col: usize) -> CSCColIter<'_>

Iterate over non-zero elements in a column.

pub fn multiply_vector(&self, x: &[Precision], result: &mut [Precision])

Matrix-vector multiplication: result = A * x

pub fn multiply_vector_add(&self, x: &[Precision], result: &mut [Precision])

Matrix-vector multiplication with accumulation: result += A * x

pub fn nnz(&self) -> usize

Get number of non-zero elements.

pub fn to_triplets(&self) -> Result<Vec<(usize, usize, Precision)>>

Extract as coordinate triplets.

pub fn scale(&mut self, factor: Precision)

Scale all values by a factor.

pub fn add_diagonal(&mut self, alpha: Precision)

Add a value to the diagonal.

Trait Implementations

impl Clone for CSCStorage

fn clone(&self) -> CSCStorage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CSCStorage

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CSCStorage

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CSCStorage

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.