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SA-W


Last seen: Today |  Active since 2021

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importdata produces strange output when reading a textfile with blank cells and text
I want to import the attached file which is the result of matlabs function run. As you can see, there are a couple of blank cell...

3 days ago | 2 answers | 0

2

answers

Question


lsqnonlin with multiple start vectors: continue with next start vector if the function computing the objective function sets a "flag"
I want to execute lsqnonlin with multiple start vectors by iterating over a for-loop. If the function called by lsqnonlin (here,...

5 days ago | 0 answers | 0

0

answers

Question


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...

17 days ago | 0 answers | 0

0

answers

Question


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...

18 days ago | 1 answer | 0

1

answer

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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...

18 days ago | 0 answers | 0

0

answers

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...

19 days ago | 1 answer | 0

1

answer

Question


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

2

answers

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

1

answer

Question


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

1

answer

Question


vector of line chart objects returned by plot - problem with modifying markers,...
Dear all, Here is a snippet of my code: plot_array = zeros(5,1); x=0:0.1:1000; y=x.^3 for p=1:1:5 ...

1 year ago | 1 answer | 0

1

answer