Created
July 31, 2014 23:44
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add a cat
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| library(httr) | |
| library(ggplot2) | |
| add_cat <- function(width = 400, height = 400){ | |
| r <- GET(paste("http://theoldreader.com/kittens", width, height, sep = "/")) | |
| stop_for_status(r) | |
| img <- content(r) | |
| bw <- 0.2989*img[,,1] + 0.5870*img[,,2] + 0.1140*img[,,3] | |
| lighter <- bw + (0.7 * (1-bw)) | |
| annotation_raster(lighter, xmin=-Inf, xmax=Inf, ymin=-Inf, ymax=Inf) | |
| } | |
| ggplot(mpg, aes(cty, hwy)) + | |
| add_cat() + | |
| geom_point() |
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