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# SA-W

Last seen: 1 day ago Active since 2021

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add (white) Gaussian noise to displacement signal, noise level = ( |x-x*| / |x*| ): can I use utilize awgn()?
I want to add artificial (white) Gaussian noise to my numerically generated signal. In the title of my question, x %is the dis...

9 days ago | 0 answers | 0

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Check Gradient (Jacobian) of objective function -- what is the meaning of absolute difference (1e-6) if component of gradient is less than 1 ?
I use lsqnonlin to solve my data-fitting problem and provide the Jacobian, which I verify using CheckGradients option. As state...

10 days ago | 1 answer | 0

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is randn() appropriate to emulate noise coming from digital image correlation?
I want to emulate experimental data coming from an digital image correlation (DIC) system. Currently, I generate the displacemen...

10 days ago | 0 answers | 0

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Question

element-wise operator to scale rows of matrix with entries of a vector
Given a matrix and a vector A = [2 3 4 5;5 4 3 2;1 2 3 4;4 3 2 1]; d = [1 2 3 4]; I want to scale the rows of A with the corr...

11 days ago | 1 answer | 0

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possible to reduce the relative difference for CheckGradients in optimization (fmincon)?
When double-checking my Jacobian using CheckGradients, I have a relative maximum difference of, crudely, 4e-6, and my entries o...

3 months ago | 2 answers | 0

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Question

pass a vector from matlab to a c++ program
function res = fun(p,y) s = call_a_cpp_program_which_operates_on_p res = s - y; end In the above function, 'p' is a vector a...

6 months ago | 1 answer | 0

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isqnonlin: compute part of objective function outside of matlab
I am solving a partial differential equation depending on some design variables (material parameters). I want to fit the materia...

6 months ago | 1 answer | 0