normest

2-norm estimate

📝 Syntax

• nrm = normest(A)

• [nrm, count] = normest(A)

• nrm = normest(A, tolerance)

• [nrm, count] = normest(A, tolerance)

📥 Input argument

• A - Input matrix

• tolerance - Relative error tolerance

📤 Output argument

• nrm - Matrix norm: scalar.

• count - Number of power iterations: scalar.

📄 Description

nrm = normest(A) returns an estimate of the 2-norm of the matrix A.

💡 Example

M = [    0    2.4495         0         0         0         0         0
    2.4495         0    3.1623         0         0         0         0
         0    3.1623         0    3.4641         0         0         0
         0         0    3.4641         0    3.4641         0         0
         0         0         0    3.4641         0    3.1623         0
         0         0         0         0    3.1623         0    2.4495
         0         0         0         0         0    2.4495         0];
[nrm, count] = normest(M)
norm(M)

🔗 See also

norm, svd.

🕔 History

Version	📄 Description
1.0.0	initial version