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Valeri Aronov
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How to loosen equation constaints in my fmincon process?
My objective function (including analytical gradients) and equality constaints are a bit too bulky to present them here. I sta...
2 years 前 | 1 个回答 | 0
1
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Matrix-vector operations without loops
How do I do this without loops: HessW = rand(length(x), length(x), length(f)); GradW = rand(length(x), length(f)); A = zeros(...
3 years 前 | 2 个回答 | 0
2
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reshape() error in the function created by matlabFunction()
The error is known to MATLAB and will be fixed in the future
reshape() error in the function created by matlabFunction()
The error is known to MATLAB and will be fixed in the future
3 years 前 | 0
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What is missing from MATLAB #2 - the next decade edition
Your TypicalX option for fminunc() (and others?) should be extended beyond usage for gradient evaluation only. I have used norm...
What is missing from MATLAB #2 - the next decade edition
Your TypicalX option for fminunc() (and others?) should be extended beyond usage for gradient evaluation only. I have used norm...
3 years 前 | 0
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Rewriting code without loops
I have the following sizes of arrays of doubles: dev 101x1 GradW 4x101 HessW 4x4x101 The...
3 years 前 | 1 个回答 | 0
1
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How to rewrite my code without loops?
How to rewrite this code without loops: Grad = zeros(size(x)); for i=1:length(x) for j=1:l...
3 years 前 | 1 个回答 | 0
1
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reshape() error in the function created by matlabFunction()
matlabFunction() has generated for me AmplAndDers() to be used in fminunc(). The very first objective function evaluation fails...
3 years 前 | 2 个回答 | 0
2
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Unrecognized function or variable 'datachk'?
Soryy for the long Description. I have prepared a target function for optimization and am using it to build contours for now. He...
3 years 前 | 1 个回答 | 0
1
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Populating 2D meshgrid of a function of four variables
I have a function: function [y, Grad, Hess] = Target(x) ... end; where x's size is 4 (a vector of 4 variables)....
3 years 前 | 1 个回答 | 0
1
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Replacing function variables with a vector before taking a gradient
I have a symbolic function: A = 1/((C1*C2*R1*R2*w^2 - 1)^2 + w^2*(C2*R1 + C2*R2)^2)^(1/2) I would like to replace C1, C2, R1, ...
3 years 前 | 1 个回答 | 0
1
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Can I substitute a particular expression?
subexpr() discovers a common subexpression and rewrites a symbolic expression in terms of the found subexpression. How can I sim...
3 years 前 | 1 个回答 | 0
1
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How to rewrite my expression using two abbreviations?
I tried Rewrite Expression Using Abbreviations example in https://au.mathworks.com/help/symbolic/subexpr.html for subexpr() and...
3 years 前 | 1 个回答 | 0
1
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How to get rid of sign() in diff() results?
I have a symbolic function. diff() produces the result with sign(). The next derivative has dirac() in it. Is there a way to g...
3 years 前 | 2 个回答 | 0
2
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Using Hessian for least squares problem
It looks like lsqnonlin() from MatLab can't make use of a Hessian (it is not stated explicitly by MatLab, but I read this in the...
3 years 前 | 1 个回答 | 0
1
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How do I plot a symbolic function of one variable for a specific set of argument values?
Say, I have a symbolic function y(x). There is no support for plotting it when x=logspace(1, 5, 101) in fplot(). How do I do it ...
3 years 前 | 1 个回答 | 0
1
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Where is surf() result?
Can't see the plot even in the documentation example: [X,Y] = meshgrid(-2:.2:2); Z = X .* exp(...
3 years 前 | 0 个回答 | 0
0
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confusing error message: 'Not enough input arguments'?
Having: function [f] = Simple(x) f = (x(1)-1).^2 + (x(2)-1).^2; end and running: x = lsqnonlin(Simple, [2.0, 2.0]) I am g...
3 years 前 | 1 个回答 | 0