This contains R Script to calculate Top-down Correlation Iman & Conover Tecnometrics 1987 The details to use the programs are in the pdf Untitled.pdf. All information is also available in Topdow.Rmd file directly usable in R. It also calculates Spearman Rank Correlation and Kendall's Coefficient of Concordance for the standard and tied cases together with some distribution-based significance tests.