opensrdk-linear-algebra 0.6.3

Standard linear algebra library using blas and lapack for OpenSRDK toolchain.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

use crate::matrix::Matrix;
use crate::matrix::MatrixError;
use crate::number::c64;
use lapack::{dgetri, zgetri};
use std::error::Error;

impl Matrix {
    /// # Inverse
    /// with matrix decomposed by getrf
    pub fn getri(self, ipiv: &[i32]) -> Result<Matrix, Box<dyn Error>> {
        let n = self.rows();
        if n != self.cols() {
            return Err(MatrixError::DimensionMismatch.into());
        }

        let mut work = vec![f64::default(); n];
        let mut info = 0;

        let mut slf = self;
        let n = n as i32;

        unsafe {
            dgetri(n, &mut slf.elems, n, ipiv, &mut work, n, &mut info);
        }

        match info {
            0 => Ok(slf),
            _ => Err(MatrixError::LapackRoutineError {
                routine: "dgetri".to_owned(),
                info,
            }
            .into()),
        }
    }
}

impl Matrix<c64> {
    /// # Inverse
    /// with matrix decomposed by getrf
    pub fn getri(self, ipiv: &[i32]) -> Result<Matrix<c64>, Box<dyn Error>> {
        let n = self.rows();
        if n != self.cols() {
            return Err(MatrixError::DimensionMismatch.into());
        }

        let mut work = vec![c64::default(); n];
        let mut info = 0;

        let mut slf = self;
        let n = n as i32;

        unsafe {
            zgetri(n, &mut slf.elems, n, ipiv, &mut work, n, &mut info);
        }

        match info {
            0 => Ok(slf),
            _ => Err(MatrixError::LapackRoutineError {
                routine: "zgetri".to_owned(),
                info,
            }
            .into()),
        }
    }
}