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POPlotting a wireframe AND a cloud with lattice in R
 

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  1. POPlotting a wireframe AND a cloud with lattice in R
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    <p>I have a nice surface that represents nonlinear multi-part regression results on a regression with two independent variables. I would like to plot the regression predicted values as a nice 3D surface and then show the actual values as point that bounce around the surface. This would be the 3D version of plotting a regression line and showing the actuals as points around the line. I can't figure out how to do this with lattice. I'm happy to use another graphing library in R, but I don't know of others that do 3D plots. </p> <p>Here's a simplified version of what I want to do:</p> <pre><code>library(lattice) #set up some simplified data x &lt;- seq(-.8, .8, .1) y &lt;- seq(-.8, .8, .1) myGrid &lt;- data.frame(expand.grid(x,y)) colnames(myGrid) &lt;- c("x","y") myGrid$z &lt;- myGrid$x + myGrid$y noise &lt;- rnorm(length(myGrid$z),.3,.2) myGrid$z2 &lt;- myGrid$x + myGrid$y + noise </code></pre> <p>z is my smooth surface and z2 are my noisy points mostly slightly above the surface. So the surface looks like this:</p> <pre><code>wireframe(myGrid$z ~ myGrid$x * myGrid$y, xlab="X", ylab="Y", zlab="Z") </code></pre> <p><a href="http://www.cerebralmastication.com/wp-content/uploads/2009/09/wireframe.png" rel="noreferrer">alt text http://www.cerebralmastication.com/wp-content/uploads/2009/09/wireframe.png</a></p> <p>and the cloud of points looks like this:</p> <pre><code>cloud(myGrid$z2 ~ myGrid$x * myGrid$y, xlab="X", ylab="Y", zlab="Z") </code></pre> <p><a href="http://www.cerebralmastication.com/wp-content/uploads/2009/09/cloud.png" rel="noreferrer">alt text http://www.cerebralmastication.com/wp-content/uploads/2009/09/cloud.png</a></p> <p>Is it possible to get both of these in one lattice panel?</p>
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