# #——回声= FALSE,消息= FALSE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -库(knitr) #也可以写数学表达式,例如# $ Y = X美元\β+ \ε,脚注^[一个脚注。# >”他放弃(代码)安全代码速度既不值得。”# ([via](https://twitter.com/hadleywickham/status/504368538874703872)) knitr::opts_chunk$set(fig.width=10, fig.height=10, message=FALSE, warning=FALSE) ## ----loading------------------------------------------------------------------ library(microbiome)