added template for remove_column
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@ -6,7 +6,7 @@ use alga::general::ComplexField;
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use crate::allocator::Allocator;
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use crate::allocator::Allocator;
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use crate::base::{DefaultAllocator, Matrix, MatrixMN, MatrixN, SquareMatrix};
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use crate::base::{DefaultAllocator, Matrix, MatrixMN, MatrixN, SquareMatrix};
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use crate::constraint::{SameNumberOfRows, ShapeConstraint};
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use crate::constraint::{SameNumberOfRows, ShapeConstraint};
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use crate::dimension::{Dim, DimAdd, DimSum, DimSub, Dynamic, U1};
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use crate::dimension::{Dim, DimAdd, DimSum, DimDiff, DimSub, Dynamic, U1};
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use crate::storage::{Storage, StorageMut};
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use crate::storage::{Storage, StorageMut};
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use crate::base::allocator::Reallocator;
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use crate::base::allocator::Reallocator;
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@ -217,6 +217,26 @@ where
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unimplemented!();
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unimplemented!();
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Cholesky { chol }
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Cholesky { chol }
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}
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}
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/// Updates the decomposition such that we get the decomposition of the factored matrix with its `j`th column removed.
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/// Since the matrix is square, the `j`th row will also be removed.
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pub fn remove_column(
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self,
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j: usize,
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) -> Cholesky<N, DimDiff<D, U1>>
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where
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D: DimSub<U1>,
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DefaultAllocator: Reallocator<N, D, D, D, DimDiff<D, U1>> + Reallocator<N, D, DimDiff<D, U1>, DimDiff<D, U1>, DimDiff<D, U1>>,
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{
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let n = self.chol.nrows();
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assert!(j < n, "j needs to be within the bound of the matrix.");
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// TODO what is the fastest way to produce the new matrix ?
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let chol= self.chol.remove_column(j).remove_row(j);
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// TODO see https://en.wikipedia.org/wiki/Cholesky_decomposition#Updating_the_decomposition
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unimplemented!();
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Cholesky { chol }
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}
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}
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}
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impl<N: ComplexField, D: DimSub<Dynamic>, S: Storage<N, D, D>> SquareMatrix<N, D, S>
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impl<N: ComplexField, D: DimSub<Dynamic>, S: Storage<N, D, D>> SquareMatrix<N, D, S>
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