为什么我的R Markdown文件没有从Bib输出引文

Question

我正在使用R Markdown创建带引文的文档。但引文并未反映所生成的pdf文档。使用RStudio Version 0.98.994和R 3.1

这是.rmd文件

---
title: "Untitled"
author: "keniajin"
date: "Tuesday, October 14, 2014"
output: pdf_document
---

This is an R Markdown document. 

```{r}
require(knitcitations)
summary(cars)
bib <- read.bibtex("ieetutorial.bib")
```

You can also embed citations, for example:
Smith says blah [-@author00] 

BibTeX文件是

@Book{author00,
  author =   {Author},
  title =    {Title},
  publisher =    {Publisher},
  year =     2000}

Answer 1

尝试将rmd文件的最后一行更改为

Smith says blah `r citep(bib[["author00"]])`