## ---- include = FALSE, echo = FALSE------------------------------------------- options(rmarkdown.html_vignette.check_title = FALSE) NOT_CRAN <- identical(tolower(Sys.getenv("NOT_CRAN")), "true") knitr::opts_chunk$set( collapse = TRUE, comment = "#>", message = FALSE, warning = FALSE, fig.width = 6, fig.height = 3, purl = NOT_CRAN, eval = NOT_CRAN ) library(knitr)