Calculating the overall accuracy in different samples using the V-plot. Calculating the overall accuracy in different samples using the V-plot. The V-plot agreement between Cholrapid and Cholgold can be derived from any study that compared the two methods (top panel). It can be used as a fingerprint of classification agreement to calculate the overall agreement between Cholrapid and Cholgold in any sample in which the distribution of cholesterol values is known (samples A, B and C). Ricardo Petraco et al. Open Heart 2018;5:e000663 ©2018 by British Cardiovascular Society