How can i make my ODE graph make sense?
1 visualización (últimos 30 días)
Mostrar comentarios más antiguos
Ian Samuelsson
el 18 de Oct. de 2021
Comentada: Star Strider
el 18 de Oct. de 2021
I don't know why my graph is like that ! I tried to plot the differential and the solved ODE but my graph dont make sense.
I'm trying to make a graph of a ODE about a ball dropping in oil, the values are all random, just to plot the thing
clear; clc;
clearvars;
syms t v(t) aa g p p1
aa = 5;
u = 3;
g = 10
p1 = 9;
p = 3;
v0= 0;
cond = v(0) == v0
eqn = diff(v,t) == (1-p1/p)*g-(9*u/2*aa^2*p)*v
vSol(t)= simplify( dsolve(eqn,cond) )
fplot(t,vSol(t),[0 10000]); hold on; grid on;
0 comentarios
Respuesta aceptada
Star Strider
el 18 de Oct. de 2021
The fplot call is incorrect, and the function declines so quickly that it’s not possible to see it clearly with a time interval going from 0 to 1E+5.
Correct those and it works!
syms t v(t) aa g p p1
aa = 5;
u = 3;
g = 10
p1 = 9;
p = 3;
v0= 0;
cond = v(0) == v0
eqn = diff(v,t) == (1-p1/p)*g-(9*u/2*aa^2*p)*v
vSol(t)= simplify( dsolve(eqn,cond) )
figure
fplot(vSol(t),[0 1E-2]); hold on; grid on;
.
8 comentarios
Star Strider
el 18 de Oct. de 2021
The hold condition can be toggled on or off depending on whether other data are to be plotted to the same axes, or not.
Más respuestas (0)
Ver también
Categorías
Más información sobre Fluid Mechanics en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!