How to use an impoint?

I want to use impoint in the gui that I've created, but I don't know how should I do that. There is a part in my gui that the user should be able to choose 2 pixel on the loaded image and then the program runs another function with the coordinates of those 2 pixels. I want also that the program updates the coordinates when the user changes that points.

[karan padariya]

imshow(image,'Parent',app.UIAxes);hold on;

adding this in your code might work

Answer 1

[Chad Gilbert]

See help ginput. A minimal working example:

    pcolor(rand);
    [x,y] = ginput(1);
    % User clicks a value.
    x = floor(x);
    y = floor(y);

[Pani]

I'm sooooo new in Matlab, I already read the help but I still don't know how to do that. I did this but it's not what I want, I need a draggable point with impoint.

[x,y] = ginput(2)
handles.X = x;
handles.Y = y;

guidata(handles.PixelSelectionButt,handles)

[Xpath Ypath] = catetherPathFast((1-VessN).*im2double(I),y,x);
axes(handles.ShowImage);
hold on
plot(Ypath,Xpath,'b-');
hold off

[Caleb]

Read the documentation on the ginput() function. The coordinates of your mouse click are saved in variables x and y.

ginput(1) means you only want to save the location of one mouse click. If you replace the 1 with a 2, then you'll save the location of two mouse clicks. And so on...

[Pani]

I already used ginput, I don't have any problem with it, my problem is that I should use the impoint! and the points should be draggable!

[Caleb]

I'm thinking that you understand how impoint() works then from the documentation. I assume then that something is not updating correctly when you move the points again. Is that correct?

[Pani]

No, my problem is that the points are not draggable!

[Caleb]

When I'm using impoint() the points are draggable. Is there some way you can post a sample of your code?

[Pani]

I did, in my first comment