how to mark a given point on the graph?

2 次查看（过去 30 天）
SAHIL SAHOO
SAHIL SAHOO 2022-10-9
评论： SAHIL SAHOO 2022-10-10
Ran in:
ti = 0;
tf = 1E-3;
tspan=[ti tf];
KC = 4E-3;
y0= [ (10e-6)*rand(2,1); ((-3.14).*rand(1,1) + (3.14).*rand(1,1));
(10e-6)*rand(2,1); ((-3.14).*rand(1,1) + (3.14).*rand(1,1));
(10e-6)*rand(2,1); ((-3.14).*rand(1,1) + (3.14).*rand(1,1));
(10e-6)*rand(2,1); ((-3.14).*rand(1,1) + (3.14).*rand(1,1));
(10e-6)*rand(2,1); ((-3.14).*rand(1,1) + (3.14).*rand(1,1));
((-3.14).*rand(5,1) + (3.14).*rand(5,1))];
yita_mn = [
0 1 0 0 1;
1 0 1 0 0;
0 1 0 1 0;
0 0 1 0 1;
1 0 0 1 0;
]*(KC);
N = 5;
t = 1E-3;
o = sort(10e2*rand(1,10),'ascend');
[T,Y]= ode45(@(t,y) rate_eq(t,y,yita_mn,N,o),tspan,y0);
figure(1)
plot(Y(:,1),(Y(:,2)),'linewidth',2);
% i want to mark in y axis 3.57832 and in x axis 0.092
xlabel("Gain")
ylabel("Amplitude")
grid on
set(gca,'fontname','times New Roman','fontsize',18,'linewidth',1.8);
function dy = rate_eq(t,y,yita_mn,N,o)
dy = zeros(4*N,1);
dGdt = zeros(N,1);
dAdt = zeros(N,1);
dOdt = zeros(N,1);
P = 1.27;
a = 0.1;
tc = 230E-6;
tp = 5.4E-9;
Gt = y(1:3:3*N-2);
At = y(2:3:3*N-1);
Ot = y(3:3:3*N-0);
k = 4E-3;
for i = 1:N
dGdt(i) = (P - Gt(i).*((abs(At(i)))^2 +1))./tc ;
dAdt(i) = (Gt(i)-a).*((At(i))./tp);
dOdt(i) = o(1,i);
for j = 1:N
dAdt(i) = dAdt(i)+yita_mn(i,j)*(1/tp)*(At(j))*cos(Ot(j)-Ot(i));
dOdt(i) = dOdt(i)+yita_mn(i,j)*(1/tp)*((At(j)/At(i)))*sin(Ot(j)-Ot(i));
end
end
dy(1:3:3*N-2) = dGdt;
dy(2:3:3*N-1) = dAdt;
dy(3:3:3*N-0) = dOdt;
n1 = (1:5)';
n2 = circshift(n1,-1);
n16 = n1 + 15;
n17 = circshift(n16,-1);
n20 = circshift(n16,1);
j2 = 3*(1:5)-1;
j5 = circshift(j2,-1);
j8 = circshift(j2,-2);
j19 = circshift(j2,1);
dy(n16) = o(1,n2).' - o(1,n1).' - (k./tp).*(y(j2)./y(j5)).*sin(y(n16)) - (k./tp).*(y( j5)./y(j2)).*sin(y(n16)) + (k./tp).*(y(j8)./y(j5)).*sin(y(n17)) + (k./tp).*(y(j19)./y(j2)).*sin(y(n20));
end
  3 个评论
显示 1更早的评论
dpb
dpb 2022-10-9
"i want to mark in y axis 3.57832 and in x axis 0.092"
That's in the edge of the dark blob where line space is so close as to be indistinguishable, but definitely in the ROI.
You swapped x,y, Star... :)
hXY=plot(0.092,3.57832,'xr');
where saved a handle to the specific point/line so can delete/recreate/modify at will more easily...

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 2-D and 3-D Plots 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