Changes in version 0.2.4 (2024-07-22) - Incorporated changes suggested by GCC compiler for C++20 to suppress the warning: warning: template-id not allowed for constructor in C++20. Changes in version 0.2.1 (2022-05-02) - Add a parameter of initialization matrix to eimpute and r.search function. Changes in version 0.1.1 (2020-04-28) - Add a rank search function with information criterion rule and cross validation. - Use Rcpp to rewrite biscale function. Changes in version 0.1.0 (2020-03-20) - Initial CRAN version.