% FUNCTION ZOOM2CURSOR
% ZOOM2CURSOR, without arguments, will activate the current axis, create a text box showing the current position of the mouse pointer (similar to pixval), and automatically zoom the image to the location of the cursor as it is moved. The zoomed display dynamically scrolls with the motion of the cursor.
% By default, the function zooms to 50% of the image in the axis.
% BUTTON CLICKS:
% Left-clicking will zoom in further, and right-clicking will zoom out.
% Shift-clicking (or simultaneously clicking the left and right mouse buttons) at any point will display the original (un-zoomed) image, as will moving the cursor outside of the current axis. The zoom percentage is restored when the mouse is moved.
% Double-clicking zooms out to the original image, modifying the zoom percentage.
% Tested under R12.1 and R13.
% Written by Brett Shoelson, Ph.D. (email@example.com, firstname.lastname@example.org)
% 2/16/03; Rev 2: Program is more robust; fixes a bug when window is resized.
%Incremental increase/decrease in zoom percent (on mouseclick) has been reduced.
%ALSO: Now works with images, surfaces, lines (and thus plots), and patches (rather than just images)
Brett Shoelson (2021). zoom2cursor (https://www.mathworks.com/matlabcentral/fileexchange/2902-zoom2cursor), MATLAB Central File Exchange. Retrieved .
The buttondown actions are defined in sub-function bdfcn(); you can overwrite whatever you want there. (Left = 'normal', Right = 'alt', Middle = 'Extend'. However, the function will no longer do what it was designed to do if you change those. I'm not sure what exactly you're trying to do, but I would imagine that there's a better way to do it than by editing this function.
I would like to disable the left-click and right-click and middle-button functions while using zoom2cursor, how can I do that. I want those buttons to function either as to how I would define them or their default functioning.
@ Ramon, David, kukke, others...
This file is quite old, and I haven't updated it in 16 years. It seems that it has become buggy and unreliable. I will try to circle back to address some issues, but in the meantime I'm afraid I can't warranty this tool. Sorry!
how to use this code? Sorry I am new to Matlab. Thanks!
Thanks for the feedback. I hadn't touched this file in many years--glad you're finding it useful. Regarding your request...It took me about two minutes to modify the file to allow the specification of axes to activate. Happy to send it to you if you send me your address.
Great feature! Amazing work.
It ll be useful if it can hover and zoom on figure containing subplots. it works only for the last subplot
This way to interact with data is fantastic, truly a wonderful contribution!
I think there is a bug, or perhaps a false expectation on my part. In MATLAB 2012a on a Mac, I create a simple image and investigate it zoom2cursor:
The one white pixel in the matrix is at (50,125) but using zoom2cursor it reports the pixel to be at ~(64,117). Thoughts about this?
Thanks for all the feedback.... Regarding EXIT functionality, doesn't clicking on the "x" (lower left) suffice?
it is really useful,
Thanks for Sharing...
Very useful, thanks.
For those wondering how to exit the function, just click on 'X'.
I've found useful to create a 'exit_zoom2cursor' function.
If you're interested, comment the statement 'endbutton = ...'
And call this function:
zoomparams = getappdata(gcf,'zoomparams');
Excellent usage of figure handles.
Waiting for your next work
Very good work. Will help me greatly.
How do you exit, assuming you can? Or do you just have to close the figure?
VERY VERY VERY nice!!
A nice improvement would be to have an 'escape' mode to allow selecting a different figure or subplot ..or just plain 'exit' of the function....
Nice work! Just what I needed, and it works great on R14 on a Mac.
Very nice! I was contemplating writing something like this, but I was glad to find that someone else had already accomplished the daunting task.
Very cool utility to simplify the work with plots!
Excellent feature for Visual data exploration.
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