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Time-dependent parameter in ODE solver
I was trying to understand how to deal with time-dependent parameter in ODE solver. Having this error "Error using interp1>resha...
etwa 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Is it possible to send a vector of estimation corresponding to each xdata at lsqcurvefit function?
Is it possible to send a vector of estimated parameters in lsqcurefit function, where for each xdata value a different estimatio...
etwa 5 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
ODE45 Solution for a coupled equation
Hi, I have a coupled differential eqaution for a decay model. I have tried to solve the problem with ODE45 (code given below). T...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
System of differential equations and fitting with lsqcurvefit
Hi, I have a system of equation like this dN/dt = J(t)/(e*d) - gamma*N.^2, .............. (1) here J(t) is time dependent term-...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Error : Objective function is returning undefined values at initial point. lsqcurvefit cannot continue
I am having this ''Objective function is returning undefined values at initial point. lsqcurvefit cannot continue'' errror messa...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortSolution of Non linear Equation
Hi Stephan, I did'nt understand the new process quite good (not converting symbolic solutions into double data type). Please exp...
fast 7 Jahre vor | 0
Frage
Solution of Non linear Equation
Hi, I am using trying to find a sloution for a nonlinear system. With the matlab function 'vpasolve', I am now able to get the s...
fast 7 Jahre vor | 3 Antworten | 0
3
AntwortenFrage
how to solve system of nonlinear equation
I have a set of nonlinear equation as -(C1+C2)*x+C3*y-C4*x*y+1/4*C5*y^2+C6 = 0,....(1) C2*x-(C3+C7)*y-5/4*C5*y^2+3*C6 = 0;......
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
System of nonlinear equations
I have designed a code for a system of two nonlinear equation (code given). I have tried 'fsolve' to find the solutions. But I a...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Error: Function value and YDATA sizes are not equal
I have a fitting code with lsqcurvefit function. I am having this error "Function value and YDATA sizes are not equal"(line 251...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
how to control fitting in 'lsqcurvefit'?
Hi, I have a experimental data fitting code given below. In this code from the differential equation (line 30), the 'lsqcurvefit...
etwa 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to send specific conditions to lsqcurvefit?
Hi, I have a experimental data fitting code given below. In this code from the differential equation (line 30), the 'lsqcurvef...
etwa 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to do curve fitting with differential equation?
I have a differential equation as, dotn(1) = -k_rs*n(1)-k_ISC*n(1)-k_SS*n(1)^2-k_ST*n(1)*n(2)+0.25*k_TT*n(1)^2; Here k_S...
etwa 7 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Is it possible to solve a differential equation without ODE functions?
If dy/dt=-ky...(1) can be written as y_n = y_(n-1)-ky*Δt......(2), where dy= y_n - y_(n-1) How to solve equation (2) using a Fo...
etwa 7 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
How can I solve this system of differential equation
Trying to solve this problem (picture and zipped Simulink file of the problem added). I am not sure what's went wrong, maybe it'...
etwa 7 Jahre vor | 1 Antwort | 0
