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POFixing plot scale ratios of plots (and then unfixing them again)
 

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  1. POFixing plot scale ratios of plots (and then unfixing them again)
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    <p>I have used the function <em>daspect()</em> to make the Y and Z axes of a 3-dimensional plot appear with equivalent scale sizes in MATLAB.</p> <p>I acheived this using the following code (applied after plotting a figure with <em>plot3</em>):</p> <pre><code>tmpAspect=daspect(); % get the aspect ratio of the axes scales daspect(tmpAspect([1 2 2])); % make the Y and Z axes equal in scale </code></pre> <p>This is exactly the behaviour I am looking for, as I need the Y and Z axes to be the same when the figure is initially plotted.</p> <p>However - if I try to then zoom in, I am only able to zoom whilst maintaining the strict relationship between the Y and Z axes. This is of course exactly what I've asked the program to do, and it's doing its job very well. But I only want this relationship between the Y and Z axes to be applied at the time of generating the plot - after that, it needs to be possible to zoom in any way I like.</p> <p>Is there a way of setting a plot up with an equivalent scale (as in the code above), but allowing the user to then break this relationship if they want to?</p> <p>Edit: image below shows three views of my figure. First, in three dimensions, it can be seen that it's useful to maintain a strict relationship between the Y and Z axes (both are in degrees). Second, this is the view of the X and Y axes only. In order to see in more detail (3rd image), it's necessary to zoom in horizontally only. At this point, it's useful to remove the relationship between the Y and Z axes to facilitate better visualisation.</p> <p>n.b. The Y axis contains the 'X position' data and the Z axis contains 'Y position' data. Just to make things more confusing!</p> <p><img src="https://i.stack.imgur.com/gXoHm.jpg" alt="enter image description here"></p>
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    1. COhow about giving a `axis auto` before zooming?
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      1. USRody Oldenhuis
    2. COI'm not quite sure how you would like to be able to zoom. I can't think of any way you could manipulate your 3D plot by zooming, rotating or moving and change the aspect ratio in the process. Just try ti on a plot where you never set `daspect`. The aspect ratio will never change independent of what you do.
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    3. COOnce I start zooming, I want the axes relationship to be able to be broken. The question is: how could I have the relationship break as soon as the user starts to perform a horizontal or vertical-specific zoom? What I'm looking for is how to detect when the user is trying to zoom in one axis only << if userZooms // axis 'auto'; // end >>; then I can use @Rody's suggestion
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