has specified data input has specified data output implements has format specification is published by is executed in data visualization Nonlinear Estimation by Iterative Partial Least Squares SVDimpute algorithm R data frame pcaMethods A cluster based method for missing value estimationn is included for comparison. BPCA, PPCA and NipalsPCA may be used to perform PCA on incomplete data as well as for accurate missing value estimation. A set of methods for printing and plotting the results is also provided. http://bioconductor.org/packages/2.4/bioc/html/pcaMethods.html Nandini Badarinarayan Graph plot Bayesian Model BioConductor Software R software Expectation-Maximization(EM) algorithm cross validation Bioconductor