Changes in version 0.2.0                        

  - Initial release of ZTRecur to CRAN.
  - Provides functions for marginal regression and nonparametric
    estimation of zero-truncated recurrent event data with coarsened
    censoring times.
  - Features C++/Armadillo integration via Rcpp and RcppArmadillo for
    efficient computation.
  - Key exported functions include:
      - birth.interval(): Generates birthdate intervals based on integer
        ages.
      - nonpara_esti(): Nonparametric estimation of marginal mean and
        rate functions.
      - plot_nonpar(): Visualization of estimated marginal mean and rate
        functions.