Changes to Version 1.31

  o Added functions to calculate sample size for non-inferiority trial of two means and two survival curves.

  o Small bug fixes.

Changes to Version 1.30

  o Changed to use "readxl" package instead of "XLconnect" package to read Excel files for compatibility with R commander version 2.2-0. For R commander version 2.1-7 or earlier version, RcmdrPlugin.EZR version 1.29 is required to import Excel files.

  o Changed to include all R commander original menu items of the latest version in the EZR menu (in "Original menu").

  o Changed the scripts to draw adjusted survival curves for compatability with new version of "survival" package.

Changes to Version 1.29

  o Small bug fixes.

Changes to Version 1.28

  o Enabled several menu items on EZR on OS X.
  
  o Man-Whitney U test now shows summary data.
  
  o Chaged library() or require() to Library().

Changes to Version 1.27

  o Added a function to plot ROC curve after logistic regression.

  o Added an option to merge datasets by matching specified columns.

  o Small bug fixes.

Changes to Version 1.26

  o Added a function to bun numeric variable to more than 2 levels with specified thresholds.

  o Added a function to reshape a wide format dataset to a long format dataset including all data.

  o Enabled grouping with two factors in frequency bar graph.

Changes to Version 1.25

  o Added functions to copy, rename, and merge datasets.

  o Added an option to pool standard mean difference in metaanalysis of continuous variables.

  o Small bug fixes.

Changes to Version 1.24

  o Added likelihood ratio test after logistic regression analysis.

Changes to Version 1.23

  o Added functions to output summary tables.

Changes to Version 1.22

  o Small bug fixes.

Changes to Version 1.21

  o Added generalized Welch test.

  o Small bug fixes.

Changes to Version 1.20

  o Changed dialogue design and added apply button for Rcmdr ver 2.0-0.

  o Changed the method to set the breakpoints between histogram cells from "Sturges" to "Scott". Made a new function, hist2(), to fix a bug of hist().

  o Changed the scripts to draw cumulative incidece function from using "etype" option to using "mstate" option, and at the same time, updated stackcuminc() for "Stacked cumulative incidences" for compatability with new version (2.37-2) of "survival" package.

  o Added stepwise selection function based on AIC and BIC in Fine-Gray proportinal hazard regression.

  o Enabled importing Excel files in EZR on OSX and on 64bit Windows using XLConnect package. 

  o Added car package in "Suggests:" and require(car) in EZR.R, since this package has been moved from "Depends:" to "Suggests:" in the Rcmdr package.

Changes to Version 1.12

  o Move optmatch package from "Depends:" to "Suggests:", because the package has a license which restricts to academic use. Descriptions with regard to the usage restriction of the packages were added to the DESCRIPTION file.

Changes to Version 1.11

  o Updated print.ci.summary() and stackcuminc() for "Cumulative incidence of competing events" and "Stacked cumulative incidences" for compatability with the new version (2.37-2) of "survival" package.

  o Small changes to multiple regression and logistic regression models (to show variance inflation factors).

  o Bug fix in changing graph size to "Medium".

  o Bug fix in "Dot chart" (The number of grouping variable should be 0 or 1).

Version 1.10

  o Initial version to CRAN.
