Changes in version 1.0.4 (2023-05-08)                  

  - Refined the handle of isValidAndUnreserved().
  - Enhanced the forester() to render labels better.

                        Changes in version 1.0.3                        

  - Add utf8 as dependency to try passing check.

                 Changes in version 1.0.2 (2021-10-28)                  

  - Fixed changable ALL group in ezcox_group().
  - Supported interaction term in controls option.

library(survival)
library(ezcox)

lung$ph.ecog <- factor(lung$ph.ecog)
ezcox(lung, covariates = c("age"), controls = "sex:ph.ecog")
ezcox(lung, covariates = c("age", "wt.loss"), controls = "sex:ph.ecog")

show_forest(lung, covariates = c("age", "wt.loss"), controls = "sex:ph.ecog")

lung2 <- lung
lung2$sex <- ifelse(lung2$sex == 1, "M", "F")
ezcox_group(lung2, grp_var = "sex", covariate = "ph.ecog", controls = "age : wt.loss")

                 Changes in version 1.0.1 (2021-10-04)                  

  - Fixed sample counting when input data contains unavailable time and
    status values.
  - A vignette for advanced usage has been added to
    https://shixiangwang.github.io/ezcox-adv-usage/.
  - Fixed label rendering for global p value.

                 Changes in version 1.0.0 (2021-09-12)                  

  - Added forester().
  - Used roxytest for unit testing.

                        Changes in version 0.8.2                        

  - Added code to panel function to support new feature from
    forest_model().

library(survival)
library(ezcox)

lung$ph.ecog <- factor(lung$ph.ecog)
# Build unvariable models
# and show global p value for each model
# aside the 'reference' label.
show_forest(lung, covariates = c("age", "sex", "ph.ecog"), show_global_p = "aside")

                 Changes in version 0.8.1 (2021-03-16)                  

  - Tried fixing CRAN checking issue.

                 Changes in version 0.8.0 (2020-09-25)                  

  - Added more options in show_forest() for better visualization.

                 Changes in version 0.7.0 (2020-07-01)                  

  - Added ezgrp() for group cox analysis.
  - Added headings control.

                 Changes in version 0.6.0 (2020-06-03)                  

  - Fixed bug about showing model with unvalid R variable names.

                 Changes in version 0.5.0 (2020-05-10)                  

  - Supported other parameters in coxph.

                 Changes in version 0.4.0 (2020-01-10)                  

  - Add function show_forest, which is a wrapper of function ezcox,
    get_models and show_models.

                        Changes in version 0.3.1                        

  - Fix the bug that a NA is added to model names when no control

                 Changes in version 0.3.0 (2019-12-06)                  

  - Remove parallel option in ezcox()
  - Add ezcox_parallel() for better parallel computation (#10)

                        Changes in version 0.2.5                        

  - Add 'auto' option for filtering

                        Changes in version 0.2.4                        

  - Fix bug: cannot get model result from parallel model
  - Add clean_model_dir()

                        Changes in version 0.2.3                        

  - Add show_models()

                        Changes in version 0.2.2                        

  - Add filter_ezcox() and get_models()

                        Changes in version 0.2.1                        

  - Add verbose option. This may speed up parallel computation.

                 Changes in version 0.2.0 (2019-11-17)                  

  - Parallel computation is implemented in parallel option by furrr
    package.

                 Changes in version 0.1.0 (2019-10-20)                  

  - The first experimental version submitted to CRAN.
  - Added a NEWS.md file to track changes to the package.