Dear R-friends, I am stuck making an LD plot of a small genotype set: An exert of my data (genotypes) >tempped.exert V27/V28 V33/V34 V39/V40 V41/V42 1 B/B B/B A/A B/B 2 B/A B/B A/B B/B 3 B/B B/B A/A B/B 4 B/A B/A A/B B/A 5 B/B B/B A/A B/B I thought he LDheatmap package would be of use >library(LDheatmap) >LDheatmap(tempped.exert) Gives me the desired LD map of the first two columns only. How do I make it to take all 4 SNP's/colomns? Your help is highly appreciated, Thanks, Marco