2016-12-26 Andy Leung
* 4.1
* Added filter option to TSGS function and removed filter related parameters options
* Added DDC and UBF-DDC for filter choices
2016-09-04 Andy Leung
* 4.0
* Added Rocke loss function option to GSE
* Added cluster sampling option to EMVE
* Added bivariate filtering option to GY-filter
* Updated TSGS with the new options implemented
* Separated the imputed S-estimator from GSE as an individual function
2016-08-04 Andy Leung
* 3.3.1
* Fixed mem problem in pmd calculation
2016-02-19 Andy Leung
* 3.3
* Fixed some error message handling
* Update plot function according to changes made in ggplot2
2015-12-29 Andy Leung
* 3.2.3
* Added small perturbation to the point mass contamination in the data generator
2015-06-26 Andy Leung
* 3.2.2
* Increased the number of subsamples in EMVE.
* Fixed seed problem
2015-06-26 Andy Leung
* 3.2
* Implemented fast 2SGS as described in the rejoinder of the 2SGS paper
* Implemented the partial implementation procedure as described in the rejoinder of the 2SGS paper
* Removed the accessor -- getInitial (unecessary)
* Added 'rrcov' package in the imports field
2015-04-08 Andy Leung
* 3.1.1
* Fixed set seed issue
* Fixed the condition number restriction bug in the estimation of EMVE
2014-08-04 Andy Leung
* 3.1
* Convert the iteration code of EM to all C++ (or Rcpp)
* Convert the subsampling and concentration part of emve to all C++ (or Rcpp)
* Include the initial estimates mu0 and S0 as an attribute of the GSE class
* Include the imputed data matrix, weights, and first deriviative of weights used in the location estimation as new attributes of the GSE class
* Create a new accessor -- getInitial -- for the new attributes of the GSE class (see above bullet)
* Include TSGS, a new function that computes 2SGS estimate for cell- and case-wise outliers
* Include Geochemical data that is analyzed in the 2SGS article
2013-06-04 Andy Leung
* 3.0
* Convert to S4 object system
* Convert the iteration code of GSE to all C++ (or Rcpp)
2013-02-13 Andy Leung
* 2.4.2
* Fix the bug in rcondCov, now calculated condition number based on eigenvalues
2012-08-04 Andy Leung
* 2.3
* Include function to plot and print the result for different estimators
* Fix the rand seed for emve C++ code
* Update all the manuals
2012-07-15 Andy Leung
* Fix the bug of asymetric covariance matrix when iteration is large
* Algorithm stop when negative eigenvalue appears
2012-06-12 Andy Leung
* 2.2
* Include a line for only allowing up to dimension 50
* Include GMME function
* Extract cov.EM and slrt functions (and their related) from robmiss packages
* No dependency on robmiss package
2012-06-10 Andy Leung
* 2.1
* Include the function to compute Quadrant Covariance
* Include the function to compute Composite S-estimator
* Include the version of GSE with initial estimator as quadrant covariance
2012-05-12 Andy Leung
* 2.0
* fixed bugs in the iterative step of GSE code, i.e. computing GSE based on fixed initial estimator
* fixed bugs in computation of scale in GSE
* include GSE with fixed point approach
2012-04-30 Andy Leung
* 1.1
* GSE is rewritten in C++ at least for the iterative step but not the loop
* Reference manual for GSE is included
* Faster implementation of both EMVE and GSE by performing the computation
on groups with same missing patterns
* Code for simulating contaminated data set is included
2012-03-17 Andy Leung
* 1.0
* Depends: R (>= 2.14.1), robmiss, Rcpp (>= 0.9.8), RcppArmadillo (>= 0.2.34)
* Code for GSE computation is included
* Faster implementation of both EMVE scale and partial mahalanobis distance
* Computation of ML-estimate of location and scatter for each candidate within
the resampling procedure is restricted to only 5 iterations
2012-02-14 Andy Leung
* 0.1
* Reference manual for mve.missing.C is included
* Computation of scale for EMVE and partial mahalanobis distance is coded in C++
2012-01-14 Andy Leung
* 0.0
* Depends: R (>= 2.14.1), robmiss, Rcpp (>= 0.9.8), RcppArmadillo (>= 0.2.34)
* Only include the function to compute EMVE
* Resampling procedure is coded in C++
* No code for GSE computation is included