condestimate (MathScript RT Module Function)
Owning Class: linalgebra
Requires: MathScript RT Module
Syntax
c = condestimate(a)
c = condestimate(a, b)
[c, d] = condestimate(a)
[c, d] = condestimate(a, b)
Legacy Name: condest
Description
Returns a lower bound for the 1-norm condition number of a square matrix.
Inputs
| Name | Description |
|---|---|
| a | Specifies a matrix. |
| b | Specifies a positive integer. |
Outputs
| Name | Description |
|---|---|
| c | Returns a lower bound for the 1-norm condition number of a. |
| d | Returns the approximation of a null vector. d is a vector of the same size as the number of columns in a. |
Examples
A = [1, 2, 3; 0, 1, 1; 4, 3, 1]
D = condestimate(A)