Curves don't fit to the direction field (value) need help

2 Ansichten (letzte 30 Tage)
aertha13
aertha13 am 20 Mär. 2018
Bearbeitet: aertha13 am 21 Mär. 2018
The curves do not fit to direction.the problem is the values of t and y or linspaces , need help :/
if true
t=0.3:0.2:3; y= -10:0.5:5;
[T, Y]= meshgrid(t,y);
dY= 3.*T.^2.*exp(-T)-T.*Y-Y./T;
dT= ones (size(dY));
quiver (T ,Y ,dT,dY,5)
axis tight
syms t y(t);
eqn = diff(y,t)==3.*t.^2.*exp(-t)-t.*y-y./t;
dsolve(eqn)
hold on
X0=linspace(0.5,3);
X1=linspace(0.5,3);
X2=linspace(0.5,3);
Y0=exp(-X0).*X0.^2-exp(-X0)./X0;
Y1=exp(-X1).*X1.^2+exp(1)-1.*exp(-X1)./X1;
Y2=exp(-X2).*X2.^2+(2.*exp(1)-1).*exp(-X2)./X2;
plot(X0,Y0,X1,Y1,X2,Y2);
hold off
end
  2 Kommentare
KSSV
KSSV am 21 Mär. 2018
What exactly are you trying apart from asap?
aertha13
aertha13 am 21 Mär. 2018
I need X1 curve to be under the red line so that all curves can show the same direction. But when I change the values, I'm losing the arrows.

Melden Sie sich an, um zu kommentieren.

Antworten (0)

Kategorien

Mehr zu Numerical Integration and Differential Equations finden Sie in Help Center und File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by