MATLAB: How to get CurrentPoint to display the coordinates within a figures axes rather than the coordinates of the whole figure itself.

guiguidematMATLABplotplottingscript

Hi Everyone,

I'm totally new to matlab so please bear with me.

I've created a GUI using GUIDE which converts and plots data from .BIN files (not important but just to give context) and I want to be able to view the cursors current position relative to the axes scale.

I've managed to get the cursor position relative to the figure window by using

new_point = get(handles.figure,'CurrentPoint');
set(handles.editbox,'String',new_point)

but since the axes don't have a 'CurrentPosition' nor a callback for 'WindowButtonMotionFcn' I can't seem to get values relative to my axes.

Is the only way to get around this to multiply the 'CurrentPosition' result (in my case 'new_point') by a vector equation which corresponds to the axes I've created, or is there another way to get around this?

In an ideal world I would be able to use DataCursor but unfortunately I'm using MATLAB version 6.1.

I'll be ever so grateful for any insight anyone could lend on this,

Thanks,

Rosie

Best Answer

Use

[x,y] = ginput(1);

Related Solutions

MATLAB: Check if mouse is above an axes

Here is a little thing i threw together.

function test()
h = figure(1);
hp = uipanel('Title','Main Panel','FontSize',12,...
             'BackgroundColor','white',...
             'Position',[.1 .1 .9 .9]);
hsp = uipanel('Parent',hp,'Title','Subpanel','FontSize',12,...
              'Position',[.1 .1 .9 .9]);
hax = axes('Parent',hsp,'position',[.1 .1 .8 .8]);
plot(randi(10,4,2));
set(h,'windowbuttonmotionfcn',@mousemove);
function mousemove(hobject,eventdata)
C = get(gca,'currentpoint');
P = get(gca,'position');
xlim = get(gca,'xlim');
ylim = get(gca,'ylim');
outX = ~any(diff([xlim(1) C(1,1) xlim(2)])<0);
outY = ~any(diff([ylim(1) C(1,2) ylim(2)])<0);
if outX&outY
    set(gca,'color',[0 1 0])
else
    set(gca,'color',[1 0 0])
end
title(gca, {['(X,Y) = (', num2str(C(1,1)), ', ',num2str(C(1,2)), ')'];...
    [num2str([outX outY])]})

now obviously you'll have to adapt and see if it is what you're looking to do. I didn't have time to add some robustness checks for multiple axes but this mayget you where you need to go. So instead of looking at whether the mouse is within the axes position, i chose to check to see if the point is within the x and y limits of the axes.

MATLAB: Dynamically reading cursor location

You can use the WindowButtonMotionFcn callback of the figure object. Run the following example

fig = figure();
ax = axes(fig);
fig.WindowButtonMotionFcn = {@mouseMotionCB, ax};
function mouseMotionCB(fig, event, ax_handle)
    fprintf('Current Point is %f %f %f\n', ax_handle.CurrentPoint(1,1:3));
end

Best Answer

Related Solutions

MATLAB: Check if mouse is above an axes

MATLAB: Dynamically reading cursor location

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