DoubleTriDiagMatrix Class 
Namespace: CenterSpace.NMath.Core
The DoubleTriDiagMatrix type exposes the following members.
Name  Description  

DoubleTriDiagMatrix(DoubleBandMatrix) 
Constructs a DoubleTriDiagMatrix instance by extracting the tridiagonal part of a
banded matrix.
 
DoubleTriDiagMatrix(DoubleMatrix) 
Constructs a DoubleTriDiagMatrix instance by extracting the tridiagonal part of a
general matrix.
 
DoubleTriDiagMatrix(Int32, Int32) 
Constructs a DoubleTriDiagMatrix instance with the specified number of rows and
columns.
 
DoubleTriDiagMatrix(DoubleVector, Int32, Int32) 
Constructs a DoubleTriDiagMatrix instance with the specified dimensions
using the data in the given vector.

Name  Description  

Cols 
Gets the number of columns in the matrix.
 
DataVector 
Gets the data vector referenced by this matrix.
 
Item 
Gets and sets the value at the specified position.
 
Rows 
Gets the number of rows in the matrix.

Name  Description  

Add(Double, DoubleTriDiagMatrix) 
Adds a scalar to the nonzero elements of a tridiagonal matrix.
 
Add(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Adds two tridiagonal matrices.
 
Add(DoubleTriDiagMatrix, Double) 
Adds a scalar to the nonzero elements of a tridiagonal matrix.
 
Clone 
Creates a deep copy of this matrix.
 
DeepenThisCopy 
Guarantees that there is only one reference to the underlying
data and that this data is in contiguous storage.
 
Diagonal 
Returns a vector view of the main diagonal of this matrix.
 
Diagonal(Int32) 
Returns a vector view of a diagonal of this matrix.
 
Divide(Double, DoubleTriDiagMatrix) 
Divides a scalar by the nonzero elements of a tridiagonal matrix.
 
Divide(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Divides a tridiagonal matrix by another.
 
Divide(DoubleTriDiagMatrix, Double) 
Divides the nonzero elements of a tridiagonal matrix by a scalar.
 
Equals 
Tests for equality of this matrix and another matrix.
Two matrices are equal if they have the same dimensions
and all values are equal.
(Overrides ObjectEquals(Object).)  
GetHashCode 
Returns an integer hash code for this matrix.
(Overrides ObjectGetHashCode.)  
LeadingSubmatrix 
Returns the k by k upper left corner of the matrix. The
matrix and the submatrix share the same data.
 
Multiply(Double, DoubleTriDiagMatrix) 
Multiplies the nonzero elements of a tridiagonal matrix by a scalar.
 
Multiply(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Multiplies two tridiagonal matrices.
 
Multiply(DoubleTriDiagMatrix, Double) 
Multiplies the nonzero elements of a tridiagonal matrix and a scalar.
 
Negate 
Negation operator.
 
Resize 
Changes the dimensions of this matrix to those specified, adding
zeros or truncating as necessary.
 
ShallowCopy 
Creates a shallow copy of this matrix.
 
Subtract(Double, DoubleTriDiagMatrix) 
Subtracts the nonzero elements of a tridiagonal matrix from a scalar.
 
Subtract(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Subtracts two tridiagonal matrices.
 
Subtract(DoubleTriDiagMatrix, Double) 
Subtracts a scalar from the nonzero elements of a tridiagonal matrix.
 
ToCommaSeparated 
Returns a formatted string representation of this matrix using commas
and newlines.
 
ToCommaSeparated(String) 
Returns a formatted string representation of this matrix using commas
and newlines. Numbers are formatted using the specified format string.
 
ToGeneralMatrix 
Converts this tridiagonal matrix to a general matrix.
 
ToString 
Returns a formatted string representation of this matrix.
(Overrides ObjectToString.)  
ToString(String) 
Returns a formatted string representation of this matrix. Numbers are displayed
using the specified format.
 
ToTabDelimited 
Returns a formatted string representation of this matrix using tabs
and newlines.
 
ToTabDelimited(String) 
Returns a formatted string representation of this matrix using tabs
and newlines. Numbers are formatted using the specified format string.
 
Transpose 
Returns the transpose of this matrix.

Name  Description  

Addition(Double, DoubleTriDiagMatrix) 
Adds a scalar to the nonzero elements of a tridiagonal matrix.
 
Addition(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Adds two tridiagonal matrices.
 
Addition(DoubleTriDiagMatrix, Double) 
Adds a scalar to the nonzero elements of a tridiagonal matrix.
 
Division(Double, DoubleTriDiagMatrix) 
Divides a scalar by the nonzero elements of a tridiagonal matrix.
 
Division(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Divides a tridiagonal matrix by another.
 
Division(DoubleTriDiagMatrix, Double) 
Divides the nonzero elements of a tridiagonal matrix by a scalar.
 
Equality 
Tests for equality of two tridiagonal matrices. Two matrices are equal if they
have the same dimensions, and all values are equal.
 
(FloatTriDiagMatrix to DoubleTriDiagMatrix) 
Implicitly converts a FloatTriDiagMatrix instance into a DoubleTriDiagMatrix
instance.
 
Inequality 
Tests for equality of two tridiagonal matrices. Two matrices are equal if they
have the same dimensions, and all values are equal.
 
Multiply(Double, DoubleTriDiagMatrix) 
Multiplies the nonzero elements of a tridiagonal matrix by a scalar.
 
Multiply(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Multiplies two tridiagonal matrices.
 
Multiply(DoubleTriDiagMatrix, Double) 
Multiplies the nonzero elements of a tridiagonal matrix and a scalar.
 
Subtraction(Double, DoubleTriDiagMatrix) 
Subtracts the nonzero elements of a tridiagonal matrix from a scalar.
 
Subtraction(DoubleTriDiagMatrix, DoubleTriDiagMatrix) 
Subtracts two tridiagonal matrices.
 
Subtraction(DoubleTriDiagMatrix, Double) 
Subtracts a scalar from the nonzero elements of a tridiagonal matrix.
 
UnaryNegation 
Negation operator.
 
UnaryPlus 
Unary + operator. Just returns the input matrix.

 a11 a12 0 0 0 0 0 0   a21 a22 a23 0 0 0 0 0   0 a32 a33 a34 0 0 0 0  A =  0 0 a43 a44 a45 0 0 0   0 0 0 a54 a55 a56 0 0   0 0 0 0 a65 a66 a67 0   0 0 0 0 0 a76 a77 a78   0 0 0 0 0 0 a87 a88 
v = [x a11 a21 a12 a22 a32 a23 a33 a43 a34 a44 a54 a45 a55 a65 a56 a66 a67 a67 a77 a87 a78 a88 x ]