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Merge pull request #711 from cschenio/cschenio/doc 

Supplement the document of base/matrix
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Sébastien Crozet 2020-04-05 20:37:24 +02:00 committed by GitHub
parent fee5b41dbe 65bc037b5d
commit 240aaea626
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1 changed files with 19 additions and 0 deletions
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19
src/base/matrix.rs
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@ -279,6 +279,16 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
/// Computes the row and column coordinates of the i-th element of this matrix seen as a
/// vector.
///
/// # Example
/// ```
/// # use nalgebra::Matrix2;
/// let m = Matrix2::new(1, 2,
/// 3, 4);
/// let i = m.vector_to_matrix_index(3);
/// assert_eq!(i, (1, 1));
/// assert_eq!(m[i], m[3]);
/// ```
#[inline]
pub fn vector_to_matrix_index(&self, i: usize) -> (usize, usize) {
let (nrows, ncols) = self.shape();
@ -298,6 +308,15 @@ impl<N: Scalar, R: Dim, C: Dim, S: Storage<N, R, C>> Matrix<N, R, C, S> {
///
/// If the matrix is not empty, this pointer is guaranteed to be aligned
/// and non-null.
///
/// # Example
/// ```
/// # use nalgebra::Matrix2;
/// let m = Matrix2::new(1, 2,
/// 3, 4);
/// let ptr = m.as_ptr();
/// assert_eq!(unsafe { *ptr }, m[0]);
/// ```
#[inline]
pub fn as_ptr(&self) -> *const N {
self.data.ptr()