hange this if you want to.

---

# New files created



```r
directory/
‚îú‚îÄ‚îÄ .Rproj.user
‚îú‚îÄ‚îÄ book.Rproj
‚îú‚îÄ‚îÄ 01-intro.Rmd
‚îú‚îÄ‚îÄ 02-literature.Rmd
‚îú‚îÄ‚îÄ 03-method.Rmd
‚îú‚îÄ‚îÄ 04-application.Rmd
‚îú‚îÄ‚îÄ 05-summary.Rmd
‚îú‚îÄ‚îÄ 06-references.Rmd
‚îú‚îÄ‚îÄ  README.md
‚îú‚îÄ‚îÄ _bookdown.yml
‚îú‚îÄ‚îÄ _output.yml
‚îú‚îÄ‚îÄ  book.bib
‚îú�