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. 
	
Changes to Version 1.12

  o Moved 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 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).

