![The geometry of the Iman-Conover transformation](https://blogs.sas.com/content/iml/files/2021/06/ImanConover5-678x336.png)
A previous article showed how to simulate multivariate correlated data by using the Iman-Conover transformation (Iman and Conover, 1982). The transformation preserves the marginal distributions of the original data but permutes the values (columnwise) to induce a new correlation among the variables. When I first read about the Iman-Conover transformation,