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Question
Specifying du/dx in pde toolbox error
I am trying to solve an elliptic PDE but it has a first order partial derivative w.r.t x, but in PDE specification, it has to be...
plus de 13 ans il y a | 1 réponse | 0
1
réponseNonlinear fit to multiple data sets with shared parameters
I think to fit the data set, you can try to use least square method, that is to minimize the error between calculated value and ...
plus de 13 ans il y a | 0
Selecting the correct output.
If you want to the difference, eg. the tenth column and the start price, I think that it can be done with 1. define start pric...
plus de 13 ans il y a | 0
| A accepté
Question
Bvp4c spherical type
Hi all, I want to solve BVP of the _spherical-type_ form : y'' = y' / x^2 + g(y) using bvp4c, and one of the boundary valu...
plus de 13 ans il y a | 1 réponse | 0
0
réponseQuestion
MuPad and Symbolic Toolbox Error
Hi, i want to ask a question about MuPad. I am beginner using MuPad, I am trying to solve a coupled of ODE as follow using Mu...
plus de 13 ans il y a | 1 réponse | 0
1
réponseproblem with fmincon to optimize ISE for pid tuning using Bode s ideal trunsfer function
I don't think that the tranfer function can be used as constraint, and one other think, your script cannot be read well!
presque 14 ans il y a | 0
fminsearch
I think that you can try to save your file using the filename "f.m" (equating your function name in function definition". And tr...
presque 14 ans il y a | 0
Transfer function
if you want to try simulate the response of that transfer function with step or ramp function, you can try defining that TF with...
presque 14 ans il y a | 0
| A accepté
solve command
Are you trying to solve a system of linear equations? I found difficulties in using solve. If you want to solve linear equations...
presque 14 ans il y a | 0
Is there any function other than Fsolve to solve systems of nonlinear equations ????
I agree with Friedrich, to test, you can see the value of your equations using: [yout, fval ] = fsolve('function',guess). wh...
presque 14 ans il y a | 0
Optimization problem
I can't help you since I don't understand your problem. But after reading your explanation, I think that you have to write a M-...
presque 14 ans il y a | 0
Question
two systems of coupled elliptic PDE
Hi all, I have a question about solving a system of coupled elliptic PDE, and sadly, it is usually highly nonlinear. What is the...
presque 14 ans il y a | 1 réponse | 0
1
réponsefminsearch
i think that one of your errors is writing the function. the function should use different name for output variables.
presque 14 ans il y a | 0
Question
ode error
Hi all, i want to ask about my M-File. I cant run this code i made function dGdW = PBR(W,Y) global yao Fk0 Q0 T...
presque 14 ans il y a | 1 réponse | 0
1
réponseHelp using subfunction to compute zeros of a function
you can use fzero or fsolve to solve the problemm but it is necessary that you change initial guess to get 3 roots.
presque 14 ans il y a | 0
