在此先感谢您的帮助！我在计算机（2.9.6）和tinytex软件包上安装了MikTeX，但无论我使用什么引擎，Rmarkdown都不会编织为pdf（但是对于html而言）。我更新了软件包，其他解决方案似乎建议降级或更新软件包，因此我不确定该怎么做！
Output created: ttest.pdf
Error in tools::file_path_as_absolute(output_file) :
file 'ttest.pdf' does not exist
Calls: <Anonymous> -> <Anonymous>
In addition: Warning message:
In readLines(logfile) : incomplete final line found on 'ttest.log'
Execution halted
会话信息
> sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United
States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] tinytex_0.5
loaded via a namespace (and not attached):
[1] compiler_3.5.0 backports_1.1.2 magrittr_1.5 rprojroot_1.3-2
htmltools_0.3.6
[6] tools_3.5.0 yaml_2.1.19 Rcpp_0.12.17 stringi_1.1.7
rmarkdown_1.10
[11] knitr_1.20 stringr_1.3.1 digest_0.6.15 evaluate_0.10.1
RMD文件
---
title: "ttest"
author: "Erik Maroney"
date: "June 22, 2018"
output: pdf_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
## R Markdown
This is an R Markdown document. Markdown is a simple
formatting syntax for authoring HTML, PDF, and MS Word
documents. For more details on using R Markdown see
<http://rmarkdown.rstudio.com>.
When you click the **Knit** button a document will be
generated that includes both content as well as the
output of any embedded R code chunks within the
document. You can embed an R code chunk like this:
```{r cars}
summary(cars)
```