Nothing
if (requireNamespace("loon.data", quietly = TRUE)) {
local({
data(faces, package = "loon.data")
faces.imgs <- l_image_import_array(faces, 64, 64, img_in_row = FALSE)
l_imageviewer(faces.imgs)
group <- rep(1:40, each = 10)
## Multidimensional Scaling
D <- L2_distance(as.matrix(faces),as.matrix(faces))
faces.mds <- as.data.frame(cmdscale(D,k=4))
names(faces.mds) <- paste('pc',1:4,sep = '')
nav <- l_navgraph(faces.mds, color=gsub("FF$","",rainbow(40)[group]))
gl <- l_glyph_add_image(nav$plot, images=faces.imgs, label="olivetti faces")
nav$plot['glyph'] <- gl
})
cat(paste("\n\nThe source code of this demo file is located at:\n",
system.file("demo", "l_ng_images_faces.R", package="loon"),"\n\n\n"))
}
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