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Accept 5 answers given by other contributors
Awarded to Stanley Cheng on 20 Jul 2017
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Frage
differentiate a 7000*6 matrix with a 7000*1 vector
Hi dear, I am trying to differentiate a 7000*6 matrix with a 7000*1 vector. The details are: The size of the matrix A_disp...
etwa 9 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to solve this equation in matlab?
Can anyone teach me how to solve this equation in Matlab? Thanks so much! syms a b c theta a*sin(theta) + b*cos(theta) = c...
mehr als 9 Jahre vor | 1 Antwort | 0
1
Antwortcan GA always find a smaller objective than SQP ?
Merry Xmas and happy new year! THX so much for both of your answers! You are both right, But in my project, I want to fin...
fast 10 Jahre vor | 0
Frage
can GA always find a smaller objective than SQP ?
Hi everyone, These days I am using GA and SQP for optimization. It is very strange that the result from SQP is smaller ...
fast 10 Jahre vor | 2 Antworten | 0
2
Antwortenfmincon's nonlinear equality constraints cannot be met?
Dear pietro, I find the problem! in the constraint function and objective function, one redundant abs value was added by ...
etwa 10 Jahre vor | 0
Frage
fmincon's nonlinear equality constraints cannot be met?
Hi everyone, I am using fmincon for the optimization of the project. In the use, three nonlinear equality constraints exist,...
etwa 10 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
the nonlinear equiality constraint in multi-objective genetic algorithm (MOGA)
Hi everyone, I am using the multi-objective genetic algorithm (MOGA) in the Global Optimization Toolbox in matlab 2013b for ...
etwa 10 Jahre vor | 0 Antworten | 0
0
Antwortenhow to maximize the two-norm of one vector?
Sorry A is a 2*3 non-rectangular matrix...
etwa 10 Jahre vor | 0
Frage
how to maximize the two-norm of one vector?
Hi everyone, I am trying to solve one equation: Ax=b where A is a 4*3 non-rectangular matrix, x is the 3*1 unknown vector ...
etwa 10 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
fmincon for optimal solution
Hi everyone, I have a question about optimization as follows: the object is to maximize sum_F=(F(1)^2+F(2)^2+F(3)^2) Ho...
mehr als 10 Jahre vor | 1 Antwort | 0
1
Antworthow to write the nonlinear constraints in fmincon
Hi George, First thx very much for your input! However, in the functions of F1~F6, there are other variables g, which ...
mehr als 10 Jahre vor | 0
Frage
how to write the nonlinear constraints in fmincon
Hi everyone, I am using the fmincon in matlab to minimize the objective value as F=-(x(1)^2+x(2)^2+x(3)^2) . So the...
mehr als 10 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
what codes are needed to make the surface produced by surf have a unified color?
Hi everyone, I am using "surf" to produce a 3D surface. However, the color of it is changing with the value of Z in the surfa...
mehr als 10 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
why the first and second differential is not right after interpolation
Hi everyone, the following code shows that after an interpolation with time interval 0.01s, the first and second differential...
mehr als 10 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to span a 3*1 vector into a 3*3 skew symmetric matrix ?
Hi everyone, as the title, x=[a b c]' is a 3*1 vector, and its 3*3 skew symmetric matrix is X=[0 -c b ; c ...
mehr als 10 Jahre vor | 4 Antworten | 1
4
AntwortenFrage
what algorithms are applied in the auto tuning of PID block in simulink?
Hi everyone, as the title, could anyone tell me about that? The auto tuning really offers a really good control performan...
mehr als 10 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to set the stop time in the scope of simulink
Hi everyone, I am using the scope in the simulink to show the time history of an variable. It lasts 30 seconds but shows only th...
mehr als 10 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
how to speed up the symbolic computation?
Hi everyone, I have written a code using symbolic computation. In it, first, 20 symbolic variables are defined, after obt...
fast 11 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
why get a symbolic result in the workspace ?
Hi everyone, I run a matlab code containing symbolic variables in it. When I use "subs" code to substitute all of the symbo...
fast 11 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to set rounded to 4 decimal places for a vector?
Hi everyone, I have a 12*1 vector and all the 12 elements are numerical values. But they have too many decimal places, but 4 ...
fast 11 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
why often it takes a very very long time to show the results by using findsym?
Hi everyone, these days I am using symbolic computation in Matlab. to substitute the symbol with numerical results, i need to...
fast 11 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to obtain the orthogonal vectors of one 3*1 unit vector?
Hi everyone, I have a 3*1 unit vector as r1= [ 0.6619 0.6976 -0.2740]', and want to obtain the other two unit orthogonal vec...
fast 11 Jahre vor | 2 Antworten | 0
2
AntwortenWarning of fmincon in algorithm options
I solved it! the option is defined but i forgot to call it ! Then opts1=optimset('MaxFunEvals',30000,'MaxIter',30000,'TolF...
fast 11 Jahre vor | 0
Frage
Warning of fmincon in algorithm options
Hi everyone, These days i am using the fmincon function to get the value of four unknowns from three equations. the objective...
fast 11 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
how to add a constraint condition to fsolve?
Hi everyone, These days I want to solve a system of nonlinear equations with matlab. In the equations, there are all four unk...
etwa 11 Jahre vor | 4 Antworten | 1
4
AntwortenFrage
How to draw the 3-D figure in (a) with cubes
I have read a paper about robotics-- Hybrid head mechanism of the groundhog-like mine rescue robot. And I want to draw the 3...
mehr als 11 Jahre vor | 0 Antworten | 0
0
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