清空筛选条件
清空筛选条件

Ode45 handles function error

1 次查看（过去 30 天）
esat gulhan
esat gulhan 2020-1-2
评论： esat gulhan 2020-1-2
My function ug data is got from edittext of GUI
function ut = ug(handles, x, y)
ut = handles.edit11.String
evalc(ut)
vg is like that
Question: When i put the formula to the push button of gui below to get the dy/dx = ug/vg i got error
Formula: for a=-5:1:5;
tspan = [a 6];
y0 = [-5 5];
[xx,yy] = ode45(@(x,y) (vg(handles, x, y))./(ug(handles, x, y)), tspan, y0);
plot(xx,yy,'-k','linewidth',2);
hold on
end
My code works if i create a function like ut=ug(x,y) .... but if i do like that i cant get datas from edittext. How can i activate the code in ode 45 with datas in edit text??
  3 个评论
显示 1更早的评论
esat gulhan
esat gulhan 2020-1-2
Well
I change the formula and limits like that.So div/0 is not problem, i erased evalc(ut) in the function and write
function ut = ugs(handles, x, y)
ut = handles.edit11.String
str2func(ut)
end, and rewrite vg too
Formula: for a=1:1:5; (limits changed)
tspan = [a 6];
y0 = [-5 5];
[xx,yy] = ode45(@(x,y) (vg(handles, x, y))./(ug(handles, x, y)), tspan, y0);
plot(xx,yy,'-k','linewidth',2);
hold on
Now it gives new error,
Error using odearguments (line 90)
@(X,Y)UG(HANDLES,X,Y) must return a column vector.
esat gulhan
esat gulhan 2020-1-2
But if i change code like that
[xx,yy] =ode45(@(x,y) (1.5-0.8*y)./(0.8*x+0.5) , tspan, y0)
it works, but my wish to take formulas from the edit text of gui. I dont want to write all time manuel to the formula.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Graphics Object Identification 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by