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# tony

12 total contributions since 2013

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Question

ODE45 errer :input argument y is undefined
hi everybody, i've got a problem and it drives me crazy... In a function i defined a systeme : function dy=f_iso(t,y) ...

1 year ago | 2 answers | 0

### 2

Question

ode45 too long to solve
hi , i'm trying to solve an ode , my program works but it makes 1 hours... and o don't understand why Here is my fonction to ...

6 years ago | 2 answers | 0

### 2

Question

improve my program ode45
hi ! I would like to improve my program, i'm want it be faster and make better virtual mode memory management : global ...

6 years ago | 0 answers | 0

### 0

ode45 too long to solve
sorry , but here it's the same problem. My last problem is solved. But here the problem is a little more complex.

6 years ago | 0

Question

loop for with ode45
hi , i've got a problem.. I want to solve a EDO , so i used ODE45, i've got two function : *function dy=f_iso(t,y) g...

6 years ago | 1 answer | 0

### 1

ODE45 errer :input argument y is undefined
my program me finally work, but i don't why...

6 years ago | 0

problem to solve an EDO
yes , i'm using here EDO45 thanks for your help,i'll give a shot a it again

6 years ago | 0

problem to solve an EDO
No, my differential equation is f=abs(sigma-X1-X2)-sig0 if f<0 dp/dt=0 else dp/dt=(f/K)^n and dXi/dt...

6 years ago | 0

problem to solve an EDO
global C1 C2 D1 D2 Q b K n E sg0 ep % parametres E=140000; sg0=200; K=800; n=6; C1=300000; C2=25000; D1...

6 years ago | 0

problem to solve an EDO
I'also changed the order like that : function dy=f_cine(y,t) global C1 C2 D1 D2 Q b K n E sg0 ep y=zeros(5,1); f...

6 years ago | 0

problem to solve an EDO
yes, it's a reel, defined in my main function. I put at the beginning y=zeros(5,1) and the error has changed, ??? Attempte...

6 years ago | 0

Question

problem to solve an EDO
hi, i'm tring to solve an EDO but i've got this error message : Index exceeds matrix dimensions Error in ==> f_cine at 3 f=abs(...

6 years ago | 9 answers | 0