This package takes a list of hybridization experiment results in a simple text file:

species 1 species 2 code
Phoca largha Phoca vitulina 1
Phoca largha Phoca caspica 2
Phoca caspica Pusa hispida 2

Another text file contains code for the different hybridization result types:

code description
1 No hybrid
2 Documented hybrid
3 Hybrid with same 3rd species

Call the hybridogram function:


V1 <- c("Phoca largha","Phoca largha","Phoca caspica")
V2 <- c("Phoca vitulina","Phoca caspica","Pusa hispida")
V3 <- c(2,3,3)
hybrid_data <- data.frame(V1,V2,V3)
C1 <- c(1,2,3)
C2 <- c("No hybrid","Documented hybrid","Hybrid with same 3rd species")
codes <- data.frame(C1,C2)
hybridogram(hybrid_data, codes)

This will produce a heat map, which is the hybridogram. It is a square and symmetric heat map showing the hybrid relationships between all pairs of species. A color legend in the lower right corner shows what color each code is represented by.