Articles tagged with multivariate

To Impute or not to Impute

Clayton Deutsch

To impute is to put upon something or someone without their acceptance and, perhaps, without just cause. I always think about the trailer on many emails I receive: If you have received this message in error,… The sender imputes responsibility on the recipient without asking for or gaining acceptance. In statistics and, increasingly, geostatistics we use impute or imputation to describe the process of assigning values where values are missing in a set of data. The main advantage of this methodology is to facilitate techniques that require a full valued data table such as principal component analysis (PCA) or projection pursuit multivariate transformation (PPMT). This can be convenient; however, no technique should be used without due care and discrimination. There are alternatives to imputation. This brings the question about whether to impute or not to impute.