MATLAB: Using Zoom Function

guiuicontrolzoom

What I'm trying to do is pull a static image from google maps and then update it based on if the user zooms in on a particular location with a higher resolution picture of the zoomed in area.

My issue is that I'm not exactly sure from the documentation how the zoom method works when an area to be zoomed in on is boxed rather than clicked. If clicked the default zoom is 2x, is there a default zoom for the box? Or is there a function or easy way of calculating this zoom level?

Best Answer

Hi,

you will need to implement a post-zoom callback. Take a look at the doc for zoom and there especially at Example 5: it shows how to execute a callback after the zoom (use xlim and ylim to get the "new" zoomed in area).

Titus

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MATLAB: Are there hot keys (shortcuts) that enable interactive mouse controlled pan and zoom for a figure

Here's a way that works by using the uimenu's accelerator option. There will be a menu you could use or ctrl + letter to activate:

function HotKeyAcc
% A figure
fig = figure('menubar','none');
% Add menus with Accelerators
mymenu = uimenu('Parent',fig,'Label','Hot Keys');
uimenu('Parent',mymenu,'Label','Zoom','Accelerator','z','Callback',@(src,evt)zoom(fig,'on'));
uimenu('Parent',mymenu,'Label','Rotate','Accelerator','r','Callback',@(src,evt)rotate3d(fig,'on'));
uimenu('Parent',mymenu,'Label','Pan','Accelerator','p','Callback',@(src,evt)pan(fig,'on'));
% Some plot
plot(rand(1,50))
end

MATLAB: Setting plot zoom mode

You can set the behavior through the zoom command. See the help. For example, to zoom just in the horizontal direction.

plot(randn(100,1));
h = zoom;
set(h,'Motion','horizontal','Enable','on');

Best Answer

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MATLAB: Are there hot keys (shortcuts) that enable interactive mouse controlled pan and zoom for a figure

MATLAB: Setting plot zoom mode

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