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POHow to determine PlotRange to include all of graphics?
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  1. POHow to determine PlotRange to include all of graphics?
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    copied!<p>Given <code>Graphics</code> object, how do I determine the range of coordinates needed to include all of graphics? Basically I need something like what <code>Show</code> does by default, but I want to specify <code>PlotRange</code>,<code>PlotRangePadding</code> and <code>ImagePadding</code> explicitly.</p> <p>Example, two <code>Show</code>s below should render the same</p> <pre><code>g = Graphics[{Thickness[1], CapForm["Round"], Line[{{0, 0}, {1, 1}}]}]; Show[g] Show[g, PlotRange -&gt; getPlotRange[g], PlotRangePadding-&gt;getPlotRangePadding[g], ImagePadding-&gt;getImagePadding[g]] </code></pre> <p>Motivation: fixing diagrams in <a href="https://stackoverflow.com/questions/4230823/consistent-size-for-graphplots">this</a> question</p> <p><b>Update</b>: <code>AbsoluteOptions</code> gives me <code>PlotRange</code> but not the other two options. Explicitly specifying <code>ImagePadding-&gt;Automatic</code> changes appearance though it's supposedly <code>Automatic</code> by default.</p> <p>Two images below show differently and I don't understand why</p> <pre><code>g = Graphics[{Thickness[1], CapForm["Round"], Line[{{0, 0}, {1, 1}}]}]; Show[g] Show[g, Sequence @@ AbsoluteOptions[Show[g]]] </code></pre> <p><b>Update 2</b>: A similar problem was <a href="http://forums.wolfram.com/mathgroup/archive/2009/Nov/msg00144.html" rel="nofollow noreferrer">brought up</a> a year ago, with no solutions proposed, and not fixed as of Mathematica 8.0. To summarize</p> <ol> <li>There's no way to reproduce <code>Show[g]</code> above with explicit setting of <code>PlotRange</code></li> <li>There's no way to get absolute <code>ImagePadding</code> used by <code>Show[g]</code></li> <li><code>Show[g,PlotRange-&gt;Automatic]</code> looks different from <code>Show[g]</code></li> <li><code>AbsoluteOptions</code> can give the <a href="http://forums.wolfram.com/mathgroup/archive/2009/Nov/msg00144.html" rel="nofollow noreferrer">wrong result</a> for <code>PlotRange</code></li> </ol>
 

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