SAN空间分析说明 建立网站: bookdown :: render_book( " index.Rmd " , " bookdown::gitbook " ) 建立pdf: bookdown :: render_book( " index.Rmd " , " bookdown::pdf_book " ) 建立电子书: bookdown :: render_book( " index.Rmd " , " bookdown::epub_book " ) 对于Tufte static: bookdown :: render_book( " index.Rmd " , " bookdo