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A number of changes to BlockSparseMatrix.

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1. Add BlockSparseMatrix::CreateDiagonalMatrix
2. Add BlockSparseMatrix::AppendRows
3. Add BlockSparseMatrix::DeleteRowBlocks
4. Add BlockSparseMatrix::CreateRandomMatrix
5. Add a non-default constructor to Compressedlist.

Change-Id: I7cc7656616d059cef4471335f6d5b636807953e6
This commit is contained in:
Sameer Agarwal
2017-06-11 16:25:47 -07:00
parent 15dc18a532
commit ef31944726
4 changed files with 302 additions and 1 deletions
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internal/ceres/block_sparse_matrix.h
+43 -1
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@@ -84,10 +84,52 @@ class BlockSparseMatrix : public SparseMatrix {
void ToTripletSparseMatrix(TripletSparseMatrix* matrix) const;
const CompressedRowBlockStructure* block_structure() const;
// Append the contents of m to the bottom of this matrix. m must
// have the same column blocks structure as this matrix.
void AppendRows(const BlockSparseMatrix& m);
// Delete the bottom delta_rows_blocks.
void DeleteRowBlocks(int delta_row_blocks);
static BlockSparseMatrix* CreateDiagonalMatrix(
const double* diagonal,
const std::vector<Block>& column_blocks);
struct RandomMatrixOptions {
RandomMatrixOptions()
: num_row_blocks(0),
min_row_block_size(0),
max_row_block_size(0),
num_col_blocks(0),
min_col_block_size(0),
max_col_block_size(0),
block_density(0.0) {
}
int num_row_blocks;
int min_row_block_size;
int max_row_block_size;
int num_col_blocks;
int min_col_block_size;
int max_col_block_size;
// 0 < block_density <= 1 is the probability of a block being
// present in the matrix. A given random matrix will not have
// precisely this density.
double block_density;
};
// Create a random BlockSparseMatrix whose entries are normally
// distributed and whose structure is determined by
// RandomMatrixOptions.
//
// Caller owns the result.
static BlockSparseMatrix* CreateRandomMatrix(
const RandomMatrixOptions& options);
private:
int num_rows_;
int num_cols_;
int max_num_nonzeros_;
int num_nonzeros_;
scoped_array<double> values_;
scoped_ptr<CompressedRowBlockStructure> block_structure_;