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POfacet_wrap and scaling point size
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  1. POfacet_wrap and scaling point size
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    copied!<p><strong>In short:</strong> I would like to have separate legends for each "panel" of two-panel plot made using <code>facet_wrap</code> . Using <code>facet_wrap(scales="free")</code> works fine for when I want different axis scales, but not for the size of points.</p> <p><strong>Background:</strong> I have data for several samples with three measurements each: <em>x</em>, <em>y</em>, and <em>z</em>. Each sample is from either class 1 or class 2. <em>x</em> and <em>y</em> have the same distributions in each class. However, all the <em>z</em> measurements for class 1 are less than 1.0; <em>z</em> measurements for class 2 range from 0 to 100.</p> <p><strong>Where I'm stuck:</strong> Plot <em>x</em> and <em>y</em> on the x and y axes, respectively. Make the area of each point proportional to its <em>z</em> value.</p> <pre><code>d = matrix(c(runif(100),runif(20)*100),ncol=3) e = data.frame( gl(2,20), d ) colnames(e) = c("class","x","y","z") ggplot( data = e, aes(x=x, y=y, size=z) ) + geom_point() + scale_area() + facet_wrap( ~ class, ncol=1, scales="free" ) </code></pre> <p><img src="https://i.stack.imgur.com/eH0dJ.png" alt="enter image description here"></p> <p><strong>Problem:</strong> Note that the dots on the first panel are difficult to see because they are on the very low end of the scale used for the single legend which ranges from 0 to 100. Is it even possible to have two separate legends (each with a different range) or should I make two plots and combine them with viewports?</p>
 

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