Hello All, I have been reading (although very limited) details about Spearman confidence which is a measure of similarity of two entities rather than a correlation, and would like to attempt to apply it to some data using R. Whilst I can calculate the spearman correlation coefficient using the stats package and cor.test or cor in R, I am not having any luck to calculate the spearman confidence. Any tips would be greatly appreciated. Thankyou to anyone who can help Sabah Khalid PhD Bioinformatician Institute of Cancer Medical Oncology Unit Barts and The London, Queen Mary's School of Medicine 3rd floor, John Vane Science Building Charterhouse Square London EC1M 6BQ Email: s.khalid at qmul.ac.uk Tel: 020 7882 5613