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Question
How to Plot the stepsize
Hello, I have an ODE System and I want to solve it with ode45(). Now ode45() has a dynamical step size. BUT how can I plot t...
13 years ago | 1 answer | 0
1
answerFinding initial value
does someone knows if decic() could help? But I use ode15s....
13 years ago | 0
Question
Finding initial value
Hello, if I use numerical solver for nonlinear problems (like ode or fsolve) I need a good initial value (initial value probl...
13 years ago | 1 answer | 1
1
answerUsing fminunc()
Thank you! This funtion was just an example not really my problem. I have a n dimensional algebraic equation f(x,t)=0 with x0 an...
13 years ago | 0
Question
Using fminunc()
Hello, I want to use x = fminunc(fun,x0); For a litle test I choosed following structure: fun=[x1+x2 ; sin(x3)]; fu...
13 years ago | 4 answers | 0
4
answersQuestion
Jacoabian doesn't work
Hello, I want to calculate J=jacobian(f_algebr, yss); But I get Errors. I uploaded my mat file so you can see what ...
13 years ago | 2 answers | 0
2
answersQuestion
fsolve or local optimum?
Hello, I have a nonlinear algebraic equation system: f(x,t)=0 (where f ist a vector field and x a vector, t is the time.) ...
13 years ago | 0 answers | 0
0
answersQuestion
Extend Arithmetic precision
*Hello, when I want to solve a algebraic equation with fsolve(), it gives me a solution with low Arithmetic precision. How c...
13 years ago | 1 answer | 0
1
answerConverting cell vector to symbolic vector
it doesnt work because if my cell vector ist x_cell=[sin(t) ; t] and i convert this as shown above i get x_sym=[sin(t) ; t] ...
13 years ago | 0
Converting cell vector to symbolic vector
fid = fopen('x.txt'); x_str1 = textscan(fid, '%s'); fclose(fid); x_str=x_str1{1}; diim=size(x_str,1); for i=1:diim ...
13 years ago | 0
| accepted
Question
Converting cell vector to symbolic vector
Hello, I am a beginner in Matlab so I hope you can help me: I have a vector (Class:cell) e.g. x=[x_a ; x_b ; y_a]; I ne...
13 years ago | 2 answers | 0
