Visualizing proportions with icons

#visualizing proportions with icons

devtools::install_github("sckott/rphylopic")
library('rphylopic')
library(ggplot2)
library(MASS)

data(Animals) #load in animal brain and body weight data sample data  
catbrain<-Animals[11,2] #get brain weight for house cat 
triceratopsbrain<-Animals[16,2] #get brain weight for triceratops 

proportion<-catbrain/triceratopsbrain #calculate what the ratio is between the two species 

posx <- c(4.9,5, 6,7) #set the x position of the icons, the first and last numbers bounds 
posy <- c(4,4.5,5,6) #set the y position
sizey <- c(proportion,1) #scale the icon height to be proportional to ratio of interest 
cols<-c("black", "#989898") #select the colours of the icons

CatImage <- get_image("23cd6aa4-9587-4a2e-8e26-de42885004c9", size = 512)[[1]] #get image of cat from phylopic
TriceratopsImage<- get_image("9146defb-cd90-4136-af96-7021890d8ca7", size = 512)[[1]] #get image of triceratops from phylopic

p <- ggplot(data.frame(Image.x = posx, Image.y = posy), aes(Image.x, Image.y))

p <- p + add_phylopic(CatImage, 1, posx[2], posy[2], sizey[1], cols[1]) #call x,y, colours and size of image

p+add_phylopic(TriceratopsImage, 1, posx[3], posy[3], sizey[2], cols[2])+
  theme(line = element_blank(), text = element_blank(),line = element_blank(),title = element_blank(), panel.background = element_blank())
 

ggsave(last_plot(), file="BRAINS!.png") #save plot