mark points on graph

~do calculations

x=ddata;

y = edata;

handles=guidata(hObject);

[X,Y] = peaks;

surf(X,Y);

xlim([-inf inf]);

ylim([0 inf]);

plot(x,y,'parent',handles.axes1);

hold on

plot(x_mark,y_mark,'c*',handles.axes1)

hold off

the x_mark and y_mark are both in array that I got from a while loop. I made a GUI that plots the figure

[Jan]

Please read http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup. What is your question?

[hi hey]

How do I mark (with a dot or asteroid and different color) my (x_mark,y_mark) points on the (x,y) points on my graph?

The (x_mark,y_mark) are specific points on the (x,y) graph that I want to highlight.

The code is plotting (x,y) first and then plotting (x_mark,y_mark)

Answer 1

[Jan]

Example:

x = 1:10;
y = rand(1, 10);
s = [2,4,8];   % Indices of points to mark

plot(x, y);
hold on
plot(x(s), y(s), '*')

[hi hey]

That didn't work but I did find a few errors in my code that I fixed which solved part of my problem.

hold on

plot(x2,y2,'*')

hold off

But for some reason the points aren't on the line, they are below it. They should be on the lines because I'm picking points off of the line data.

[Jan]

I cannot guess what does not work or why which points are below which line. Please post the details.

[hi hey]

So basically I mapped coordinates on a graph. I then did a calculation to find the stopping point every 8hrs which I saved into x_mark and y_mark. I then want to have these points marked/highlighted on the graph

[Jan]

@hi hey: This explanation does not help to understand "That didn't work" and why which points are shifted vertically. If you still need help, please post something, which let the readers reconsider, what's going wrong: code, input data, screenshot of the diagram, ...