add data points to a graph

hi i have a matlab figure, and i'd like to highlight some important points on it, could anybody help me? tnx in advance

Answer 1

[David Sanchez]

Select the "Data Cursor" on the figure window and click on the point you want.

Hold "alt" to multiple selection.

[Youssef Khmou]

Good answer,

[maryam]

It really helps. thank you very much

Answer 2

[Youssef Khmou]

you have to know the xy coordinates of those points to mark them . suppose i have a graph Y(X) :

 X=1:10;Y=randn(1,10);
 plot(X,Y), hold on,
 Marked=[X(2) Y(2); X(4)  Y(4)];
 plot(Marked(:,1),Marked(:,2),'o');

[maryam]

tnx for ur answer,but i dont know the xy coordinates,just a figure.

Answer 3

[Harsh]

folowing is an example where i have highlited a point with red airstrike
function m = plot_cos(y, t)
 plot(t,y,'b--')
 hold on
 [iminy,idy]=min(y);
 plot(idy,iminy,'r*')
 hold off
 m=min(y);
end