Hello, I have two Matrices of type
type EdgeMappingMatrix = Matrix<EdgeMappingMatrixValue,
Dynamic,
Dynamic,
VecStorage<EdgeMappingMatrixValue, Dynamic, Dynamic>>
where EdgeMappingMatrixValue
implements Add
, Mul
and num_traits::Zero
and num_traits::One
.
I create them like this:
let mut connecting_left_matrix =
EdgeMappingMatrix::from_element(
connecting_edges.len(),
incoming.len(),
false.into()); // EdgeMappingMatrixValue implements From<bool>
let mut connecting_right_matrix =
EdgeMappingMatrix::from_element(
outgoing.len(),
connecting_edges.len(),
false.into());
connecting_edges
.iter()
.enumerate()
.for_each((i,(left_matrix_index, right_matrix_index)) {
connecting_left_matrix.set_row(i, &reduced_left_matrix.row(*left_matrix_index));
connecting_right_matrix.set_column(i, &reduced_right_matrix.column(*right_matrix_index));
});
and want to multiply them like this:
let new_matrix = &connecting_right_matrix * &connecting_left_matrix;
connecting_right_matrix
has connecting_edges.len()
number of rows, and connecting_right_matrix
has the same number of columns, so the multiplication should always succeed.
Unfortunately I am getting this compiler error:
error[E0369]: cannot multiply `&nalgebra::Matrix<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic, nalgebra::VecStorage<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic>>` to `&nalgebra::Matrix<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic, nalgebra::VecStorage<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic>>`
> interpreter/src/graph/path.rs:259:51

259  let new_matrix = &connecting_right_matrix * &connecting_left_matrix;
  ^  &nalgebra::Matrix<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic, nalgebra::VecStorage<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic>>
 
 &nalgebra::Matrix<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic, nalgebra::VecStorage<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic>>

= note: an implementation of `std::ops::Mul` might be missing for `&nalgebra::Matrix<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic, nalgebra::VecStorage<graph::edge_mapping::EdgeMappingMatrixValue, nalgebra::Dynamic, nalgebra::Dynamic>>`
And I can’t figure out why. The documentation writes about an implementation of Mul
which I thought should match:
impl<'a, N, R1: Dim, C1: Dim, R2: Dim, C2: Dim, SA, SB> Mul<Matrix<N, R2, C2, SB>> for &'a Matrix<N, R1, C1, SA>
where
N: Scalar + Zero + One + ClosedAdd + ClosedMul,
SB: Storage<N, R2, C2>,
SA: Storage<N, R1, C1>,
DefaultAllocator: Allocator<N, R1, C2>,
ShapeConstraint: AreMultipliable<R1, C1, R2, C2>,
I have also tried all combinations of taking references of the matricies, so that should not be the issue.
If someone could help me with multiplying these matricies, I would be very grateful.
Sincerely