r - 如何在 R markdown 中创建小节

Question

我正在尝试创建如下所示的 R markdown。在一个名为 app 的向量中，我将有多个应用程序，将仔细检查并创建一个 pdf 文件

---
title: "Java Based Apps"
date: "January 13, 2017"
output: 
  pdf_document: 
    number_sections: yes
    toc: true
    highlight: zenburn
    fig_width: 7
    fig_height: 6
    fig_caption: true

tables: yes
keep_tex: true
fontsize: 12
---



```{r message=FALSE, results = 'asis', echo=FALSE, warning=FALSE}

app<-c("Sample APP")

for (i in app){

    cat(paste("## ", "- Correlation Analysis between performance KPI's"))
    cat("\n")
    m<-corrplot(M, method="number")

    cat(paste("## ", "- JVM %CPU Usage"))
    cat("\n")

    print(ggplot(data, aes(Date, JVM_CPU, group=JVM))+geom_point()+geom_smooth(method="lm",se=F)+theme_bw()+
    ggtitle(paste(i, " - JVM %CPU Usage/15 Minute Interval"))+facet_wrap(~JVM, scale="free"))

    cat(paste("## ", "- JVM Heap Usage"))
    cat("\n")

    print(ggplot(data, aes(Date, JVM_Mem, group=JVM))+geom_point()+geom_smooth(method="lm",se=F)+theme_bw()+
    ggtitle(paste(i, " - JVM Memory Usage/15 Minute Interval"))+facet_wrap(~JVM, scale="free")+ylab("Memory Usage/MG"))

 }
```

输出需要像这样:

Sample App
   - Correlation Analysis between performance KPI's
   - JVM %CPU Usage
   - JVM Heap Usage

等等

我看到这个:

Sample App
   - Correlation Analysis between performance KPI's

但其他部分不会被创建为小节。知道我在这里做错了什么吗？

Answer 1

在每个绘图后添加 cat("\n\n") 以添加空间。这应该有助于使 ## 正确分隔各小节。