Matrix (Matrix Toolkits for Java 1.0 API)

All Superinterfaces:

Iterable<MatrixEntry>

All Known Implementing Classes:

AbstractMatrix, BandMatrix, CompColMatrix, CompDiagMatrix, CompRowMatrix, DenseMatrix, FlexCompColMatrix, FlexCompRowMatrix, LinkedSparseMatrix, LowerSPDBandMatrix, LowerSPDDenseMatrix, LowerSPDPackMatrix, LowerSymmBandMatrix, LowerSymmDenseMatrix, LowerSymmPackMatrix, LowerTriangBandMatrix, LowerTriangDenseMatrix, LowerTriangPackMatrix, PermutationMatrix, SPDTridiagMatrix, SymmTridiagMatrix, TridiagMatrix, UnitLowerTriangBandMatrix, UnitLowerTriangDenseMatrix, UnitLowerTriangPackMatrix, UnitUpperTriangBandMatrix, UnitUpperTriangDenseMatrix, UnitUpperTriangPackMatrix, UpperSPDBandMatrix, UpperSPDDenseMatrix, UpperSPDPackMatrix, UpperSymmBandMatrix, UpperSymmDenseMatrix, UpperSymmPackMatrix, UpperTriangBandMatrix, UpperTriangDenseMatrix, UpperTriangPackMatrix
```
public interface Matrix
extends Iterable<MatrixEntry>
```
Basic matrix interface. It holds doubles in a rectangular 2D array, and it is used alongside Vector in numerical computations. Implementing classes decides on the actual storage.
Basic operations

Use numRows and numColumns to get the basic size of a matrix. get(int,int) gets an element, and there are corresponding set(int,int,double) and add(int,int,double) methods as well. Note that matrix indices are zero-based (typical for Java and C). This means that the row-indices range from 0 to numRows-1, likewise for the columns. It is legal to have numRows or numColumns equal zero.

Other basic operations are zero which zeros all the entries of the matrix, which can be cheaper than either zeroing the matrix manually, or creating a new matrix, and the operation copy which creates a deep copy of the matrix. This copy has separate storage, but starts with the same contents as the current matrix.

Iterators

The matrix interface extends Iterable, and the iterator returns a MatrixEntry which contains current index and entry value. Note that the iterator may skip non-zero entries. Using an iterator, many simple and efficient algorithms can be created. The iterator also permits changing values in the matrix, however only non-zero entries can be changed.

Basic linear algebra

A large selection of basic linear algebra operations are available. To ensure high efficiency, little or no internal memory allocation is done, and the user is required to supply the output arguments.

The operations available include:

Additions

Matrices can be added to each other, even if their underlying matrix structures are different.

Multiplications

A matrix can be multiplied with vectors and other matrices. For increased efficiency, a multiplication can be combined with addition and scaling, and transpose matrix multiplications are also available.

Rank-updates

A matrix can be efficiently updated using low-rank updates. The updates can be contained in both matrices or vectors.

Transpositions

In-place transpositions of square matrices is supported, and the transpose of a matrix can be stored in another matrix of compatible size (possibly non-rectangular)

Solvers

Many dense and structured sparse matrices have fast, direct solvers, and can be used to solve linear systems without creating a factorization. These solvers are typically backed by subroutines in LAPACK

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static class Matrix.Norm
Supported matrix-norms.

Nested Classes
Modifier and Type	Interface and Description
`static class`	`Matrix.Norm` Supported matrix-norms.

Method Summary

Methods
Modifier and Type	Method and Description
`Matrix`	`add(double alpha, Matrix B)` `A = alpha*B + A`.
`void`	`add(int row, int column, double value)` `A(row,column) += value`
`Matrix`	`add(Matrix B)` `A = B + A`.
`Matrix`	`copy()` Creates a deep copy of the matrix
`double`	`get(int row, int column)` Returns `A(row,column)`
`boolean`	`isSquare()` Returns true if the matrix is square
`Matrix`	`mult(double alpha, Matrix B, Matrix C)` `C = alphaAB`
`Vector`	`mult(double alpha, Vector x, Vector y)` `y = alphaAx`
`Matrix`	`mult(Matrix B, Matrix C)` `C = A*B`
`Vector`	`mult(Vector x, Vector y)` `y = A*x`
`Matrix`	`multAdd(double alpha, Matrix B, Matrix C)` `C = alphaAB + C`
`Vector`	`multAdd(double alpha, Vector x, Vector y)` `y = alphaAx + y`
`Matrix`	`multAdd(Matrix B, Matrix C)` `C = A*B + C`
`Vector`	`multAdd(Vector x, Vector y)` `y = A*x + y`
`double`	`norm(Matrix.Norm type)` Computes the given norm of the matrix
`int`	`numColumns()` Number of columns in the matrix
`int`	`numRows()` Number of rows in the matrix
`Matrix`	`rank1(double alpha, Matrix C)` `A = alphaCC^T + A`.
`Matrix`	`rank1(double alpha, Vector x)` `A = alphaxx^T + A`.
`Matrix`	`rank1(double alpha, Vector x, Vector y)` `A = alphaxy^T + A`.
`Matrix`	`rank1(Matrix C)` `A = C*C^T + A`.
`Matrix`	`rank1(Vector x)` `A = x*x^T + A`.
`Matrix`	`rank1(Vector x, Vector y)` `A = x*y^T + A`.
`Matrix`	`rank2(double alpha, Matrix B, Matrix C)` `A = alphaBC^T + alphaCB^T + A`.
`Matrix`	`rank2(double alpha, Vector x, Vector y)` `A = alphaxy^T + alphayx^T + A`.
`Matrix`	`rank2(Matrix B, Matrix C)` `A = BC^T + CB^T + A`.
`Matrix`	`rank2(Vector x, Vector y)` `A = xy^T + yx^T + A`.
`Matrix`	`scale(double alpha)` `A = alpha*A`
`Matrix`	`set(double alpha, Matrix B)` `A=alpha*B`.
`void`	`set(int row, int column, double value)` `A(row,column) = value`
`Matrix`	`set(Matrix B)` `A=B`.
`Matrix`	`solve(Matrix B, Matrix X)` `X = A\B`.
`Vector`	`solve(Vector b, Vector x)` `x = A\b`.
`Matrix`	`transABmult(double alpha, Matrix B, Matrix C)` `C = alphaA^TB^T`
`Matrix`	`transABmult(Matrix B, Matrix C)` `C = A^T*B^T`
`Matrix`	`transABmultAdd(double alpha, Matrix B, Matrix C)` `C = alphaA^TB^T + C`
`Matrix`	`transABmultAdd(Matrix B, Matrix C)` `C = A^T*B^T + C`
`Matrix`	`transAmult(double alpha, Matrix B, Matrix C)` `C = alphaA^TB`
`Matrix`	`transAmult(Matrix B, Matrix C)` `C = A^T*B`
`Matrix`	`transAmultAdd(double alpha, Matrix B, Matrix C)` `C = alphaA^TB + C`
`Matrix`	`transAmultAdd(Matrix B, Matrix C)` `C = A^T*B + C`
`Matrix`	`transBmult(double alpha, Matrix B, Matrix C)` `C = alphaAB^T`
`Matrix`	`transBmult(Matrix B, Matrix C)` `C = A*B^T`
`Matrix`	`transBmultAdd(double alpha, Matrix B, Matrix C)` `C = alphaAB^T + C`
`Matrix`	`transBmultAdd(Matrix B, Matrix C)` `C = A*B^T + C`
`Vector`	`transMult(double alpha, Vector x, Vector y)` `y = alphaA^Tx`
`Vector`	`transMult(Vector x, Vector y)` `y = A^T*x`
`Vector`	`transMultAdd(double alpha, Vector x, Vector y)` `y = alphaA^Tx + y`
`Vector`	`transMultAdd(Vector x, Vector y)` `y = A^T*x + y`
`Matrix`	`transpose()` Transposes the matrix in-place.
`Matrix`	`transpose(Matrix B)` Sets the tranpose of this matrix into `B`.
`Matrix`	`transRank1(double alpha, Matrix C)` `A = alphaC^TC + A` The matrices must be square and of the same size
`Matrix`	`transRank1(Matrix C)` `A = C^T*C + A` The matrices must be square and of the same size
`Matrix`	`transRank2(double alpha, Matrix B, Matrix C)` `A = alphaB^TC + alphaC^TB + A`.
`Matrix`	`transRank2(Matrix B, Matrix C)` `A = B^TC + C^TB + A`.
`Matrix`	`transSolve(Matrix B, Matrix X)` `X = A^T\B`.
`Vector`	`transSolve(Vector b, Vector x)` `x = A^T\b`.
`Matrix`	`zero()` Zeros all the entries in the matrix, while preserving any underlying structure.

Methods inherited from interface java.lang.Iterable
iterator

- Method Detail
  - numRows
```
int numRows()
```
    Number of rows in the matrix
  - numColumns
```
int numColumns()
```
    Number of columns in the matrix
  - isSquare
```
boolean isSquare()
```
    Returns true if the matrix is square
  - set
```
void set(int row,
       int column,
       double value)
```
    A(row,column) = value
  - add
```
void add(int row,
       int column,
       double value)
```
    A(row,column) += value
  - get
```
double get(int row,
         int column)
```
    Returns A(row,column)
  - copy
```
Matrix copy()
```
    Creates a deep copy of the matrix
    
    Returns:
    A
  - zero
```
Matrix zero()
```
    Zeros all the entries in the matrix, while preserving any underlying structure. Useful for general, unstructured matrices.
    
    Returns:
    A
  - mult
```
Vector mult(Vector x,
          Vector y)
```
    y = A*x
    
    Parameters:
    x - Vector of size A.numColumns()
    y - Vector of size A.numRows()
    
    Returns:
    y
  - mult
```
Vector mult(double alpha,
          Vector x,
          Vector y)
```
    y = alpha*A*x
    
    Parameters:
    x - Vector of size A.numColumns()
    y - Vector of size A.numRows()
    
    Returns:
    y
  - multAdd
```
Vector multAdd(Vector x,
             Vector y)
```
    y = A*x + y
    
    Parameters:
    x - Vector of size A.numColumns()
    y - Vector of size A.numRows()
    
    Returns:
    y
  - multAdd
```
Vector multAdd(double alpha,
             Vector x,
             Vector y)
```
    y = alpha*A*x + y
    
    Parameters:
    x - Vector of size A.numColumns()
    y - Vector of size A.numRows()
    
    Returns:
    y
  - transMult
```
Vector transMult(Vector x,
               Vector y)
```
    y = A^T*x
    
    Parameters:
    x - Vector of size A.numRows()
    y - Vector of size A.numColumns()
    
    Returns:
    y
  - transMult
```
Vector transMult(double alpha,
               Vector x,
               Vector y)
```
    y = alpha*A^T*x
    
    Parameters:
    x - Vector of size A.numRows()
    y - Vector of size A.numColumns()
    
    Returns:
    y
  - transMultAdd
```
Vector transMultAdd(Vector x,
                  Vector y)
```
    y = A^T*x + y
    
    Parameters:
    x - Vector of size A.numRows()
    y - Vector of size A.numColumns()
    
    Returns:
    y
  - transMultAdd
```
Vector transMultAdd(double alpha,
                  Vector x,
                  Vector y)
```
    y = alpha*A^T*x + y
    
    Parameters:
    x - Vector of size A.numRows()
    y - Vector of size A.numColumns()
    
    Returns:
    y
  - solve
```
Vector solve(Vector b,
           Vector x)
             throws MatrixSingularException,
                    MatrixNotSPDException
```
    x = A\b. Not all matrices support this operation, those that do not throw UnsupportedOperationException. Note that it is often more efficient to use a matrix decomposition and its associated solver
    
    Parameters:
    b - Vector of size A.numRows()
    x - Vector of size A.numColumns()
    
    Returns:
    x
    
    Throws:
    
    MatrixSingularException - If the matrix is singular
    
    MatrixNotSPDException - If the solver assumes that the matrix is symmetrical, positive definite, but that that property does not hold
  - transSolve
```
Vector transSolve(Vector b,
                Vector x)
                  throws MatrixSingularException,
                         MatrixNotSPDException
```
    x = A^T\b. Not all matrices support this operation, those that do not throw UnsupportedOperationException. Note that it is often more efficient to use a matrix decomposition and its associated solver
    
    Parameters:
    b - Vector of size A.numColumns()
    x - Vector of size A.numRows()
    
    Returns:
    x
    
    Throws:
    
    MatrixSingularException - If the matrix is singular
    
    MatrixNotSPDException - If the solver assumes that the matrix is symmetrical, positive definite, but that that property does not hold
  - rank1
```
Matrix rank1(Vector x)
```
    A = x*x^T + A. The matrix must be square, and the vector of the same length
    
    Returns:
    A
  - rank1
```
Matrix rank1(double alpha,
           Vector x)
```
    A = alpha*x*x^T + A. The matrix must be square, and the vector of the same length
    
    Returns:
    A
  - rank1
```
Matrix rank1(Vector x,
           Vector y)
```
    A = x*y^T + A. The matrix must be square, and the vectors of the same length
    
    Returns:
    A
  - rank1
```
Matrix rank1(double alpha,
           Vector x,
           Vector y)
```
    A = alpha*x*y^T + A. The matrix must be square, and the vectors of the same length
    
    Returns:
    A
  - rank2
```
Matrix rank2(Vector x,
           Vector y)
```
    A = x*y^T + y*x^T + A. The matrix must be square, and the vectors of the same length
    
    Returns:
    A
  - rank2
```
Matrix rank2(double alpha,
           Vector x,
           Vector y)
```
    A = alpha*x*y^T + alpha*y*x^T + A. The matrix must be square, and the vectors of the same length
    
    Returns:
    A
  - mult
```
Matrix mult(Matrix B,
          Matrix C)
```
    C = A*B
    
    Parameters:
    B - Matrix such that B.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - mult
```
Matrix mult(double alpha,
          Matrix B,
          Matrix C)
```
    C = alpha*A*B
    
    Parameters:
    B - Matrix such that B.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - multAdd
```
Matrix multAdd(Matrix B,
             Matrix C)
```
    C = A*B + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - multAdd
```
Matrix multAdd(double alpha,
             Matrix B,
             Matrix C)
```
    C = alpha*A*B + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transAmult
```
Matrix transAmult(Matrix B,
                Matrix C)
```
    C = A^T*B
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transAmult
```
Matrix transAmult(double alpha,
                Matrix B,
                Matrix C)
```
    C = alpha*A^T*B
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transAmultAdd
```
Matrix transAmultAdd(Matrix B,
                   Matrix C)
```
    C = A^T*B + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transAmultAdd
```
Matrix transAmultAdd(double alpha,
                   Matrix B,
                   Matrix C)
```
    C = alpha*A^T*B + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transBmult
```
Matrix transBmult(Matrix B,
                Matrix C)
```
    C = A*B^T
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transBmult
```
Matrix transBmult(double alpha,
                Matrix B,
                Matrix C)
```
    C = alpha*A*B^T
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transBmultAdd
```
Matrix transBmultAdd(Matrix B,
                   Matrix C)
```
    C = A*B^T + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transBmultAdd
```
Matrix transBmultAdd(double alpha,
                   Matrix B,
                   Matrix C)
```
    C = alpha*A*B^T + C
    
    Parameters:
    B - Matrix such that B.numRows() == A.numRows() and B.numColumns() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numColumns() == C.numColumns()
    
    Returns:
    C
  - transABmult
```
Matrix transABmult(Matrix B,
                 Matrix C)
```
    C = A^T*B^T
    
    Parameters:
    B - Matrix such that B.numColumns() == A.numRows() and B.numRows() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numRows() == C.numColumns()
    
    Returns:
    C
  - transABmult
```
Matrix transABmult(double alpha,
                 Matrix B,
                 Matrix C)
```
    C = alpha*A^T*B^T
    
    Parameters:
    B - Matrix such that B.numColumns() == A.numRows() and B.numRows() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numRows() == C.numColumns()
    
    Returns:
    C
  - transABmultAdd
```
Matrix transABmultAdd(Matrix B,
                    Matrix C)
```
    C = A^T*B^T + C
    
    Parameters:
    B - Matrix such that B.numColumns() == A.numRows() and B.numRows() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numRows() == C.numColumns()
    
    Returns:
    C
  - transABmultAdd
```
Matrix transABmultAdd(double alpha,
                    Matrix B,
                    Matrix C)
```
    C = alpha*A^T*B^T + C
    
    Parameters:
    B - Matrix such that B.numColumns() == A.numRows() and B.numRows() == C.numColumns()
    C - Matrix such that C.numRows() == A.numColumns() and B.numRows() == C.numColumns()
    
    Returns:
    C
  - solve
```
Matrix solve(Matrix B,
           Matrix X)
             throws MatrixSingularException,
                    MatrixNotSPDException
```
    X = A\B. Not all matrices support this operation, those that do not throw UnsupportedOperationException. Note that it is often more efficient to use a matrix decomposition and its associated solver
    
    Parameters:
    B - Matrix with the same number of rows as A, and the same number of columns as X
    X - Matrix with a number of rows equal A.numColumns(), and the same number of columns as B
    
    Returns:
    X
    
    Throws:
    
    MatrixSingularException - If the matrix is singular
    
    MatrixNotSPDException - If the solver assumes that the matrix is symmetrical, positive definite, but that that property does not hold
  - transSolve
```
Matrix transSolve(Matrix B,
                Matrix X)
                  throws MatrixSingularException,
                         MatrixNotSPDException
```
    X = A^T\B. Not all matrices support this operation, those that do not throw UnsupportedOperationException. Note that it is often more efficient to use a matrix decomposition and its associated transpose solver
    
    Parameters:
    B - Matrix with a number of rows equal A.numColumns(), and the same number of columns as X
    X - Matrix with the same number of rows as A, and the same number of columns as B
    
    Returns:
    X
    
    Throws:
    
    MatrixSingularException - If the matrix is singular
    
    MatrixNotSPDException - If the solver assumes that the matrix is symmetrical, positive definite, but that that property does not hold
  - rank1
```
Matrix rank1(Matrix C)
```
    A = C*C^T + A. The matrices must be square and of the same size
    
    Returns:
    A
  - rank1
```
Matrix rank1(double alpha,
           Matrix C)
```
    A = alpha*C*C^T + A. The matrices must be square and of the same size
    
    Returns:
    A
  - transRank1
```
Matrix transRank1(Matrix C)
```
    A = C^T*C + A The matrices must be square and of the same size
    
    Returns:
    A
  - transRank1
```
Matrix transRank1(double alpha,
                Matrix C)
```
    A = alpha*C^T*C + A The matrices must be square and of the same size
    
    Returns:
    A
  - rank2
```
Matrix rank2(Matrix B,
           Matrix C)
```
    A = B*C^T + C*B^T + A. This matrix must be square
    
    Parameters:
    B - Matrix with the same number of rows as A and the same number of columns as C
    C - Matrix with the same number of rows as A and the same number of columns as B
    
    Returns:
    A
  - rank2
```
Matrix rank2(double alpha,
           Matrix B,
           Matrix C)
```
    A = alpha*B*C^T + alpha*C*B^T + A. This matrix must be square
    
    Parameters:
    B - Matrix with the same number of rows as A and the same number of columns as C
    C - Matrix with the same number of rows as A and the same number of columns as B
    
    Returns:
    A
  - transRank2
```
Matrix transRank2(Matrix B,
                Matrix C)
```
    A = B^T*C + C^T*B + A. This matrix must be square
    
    Parameters:
    B - Matrix with the same number of rows as C and the same number of columns as A
    C - Matrix with the same number of rows as B and the same number of columns as A
    
    Returns:
    A
  - transRank2
```
Matrix transRank2(double alpha,
                Matrix B,
                Matrix C)
```
    A = alpha*B^T*C + alpha*C^T*B + A. This matrix must be square
    
    Parameters:
    B - Matrix with the same number of rows as C and the same number of columns as A
    C - Matrix with the same number of rows as B and the same number of columns as A
    
    Returns:
    A
  - scale
```
Matrix scale(double alpha)
```
    A = alpha*A
    
    Returns:
    A
  - set
```
Matrix set(Matrix B)
```
    A=B. The matrices must be of the same size
    
    Returns:
    A
  - set
```
Matrix set(double alpha,
         Matrix B)
```
    A=alpha*B. The matrices must be of the same size
    
    Returns:
    A
  - add
```
Matrix add(Matrix B)
```
    A = B + A. The matrices must be of the same size
    
    Returns:
    A
  - add
```
Matrix add(double alpha,
         Matrix B)
```
    A = alpha*B + A. The matrices must be of the same size
    
    Returns:
    A
  - transpose
```
Matrix transpose()
```
    Transposes the matrix in-place. In most cases, the matrix must be square for this to work.
    
    Returns:
    This matrix
  - transpose
```
Matrix transpose(Matrix B)
```
    Sets the tranpose of this matrix into B. Matrix dimensions must be compatible
    
    Parameters:
    B - Matrix with as many rows as this matrix has columns, and as many columns as this matrix has rows
    
    Returns:
    The matrix B=A^T
  - norm
```
double norm(Matrix.Norm type)
```
    Computes the given norm of the matrix
    
    Parameters:
    type - The type of norm to compute

Interface Matrix

Basic operations

Iterators

Basic linear algebra

Nested Class Summary

Method Summary

Methods inherited from interface java.lang.Iterable

Method Detail

numRows

numColumns

isSquare

set

add

get

copy

zero

mult

mult

multAdd

multAdd

transMult

transMult

transMultAdd

transMultAdd

solve

transSolve

rank1

rank1

rank1

rank1

rank2

rank2

mult

mult

multAdd

multAdd

transAmult

transAmult

transAmultAdd

transAmultAdd

transBmult

transBmult

transBmultAdd

transBmultAdd

transABmult

transABmult

transABmultAdd

transABmultAdd

solve

transSolve

rank1

rank1

transRank1

transRank1

rank2

rank2

transRank2

transRank2

scale

set

set

add

add

transpose

transpose

norm