通过R markdown和knitr加载并打印新页面中的每个表

Question

I have about 60 .Rdata files in the same directory. The object name in all those .Rdata are same. I want to write some code to load and print all 60 .Rdata file and each file in the new page. For example, if the file name is file_1.rdata , file_2.rdata and file_3.rdata . The object name in all three .Rdata files is table . The following knitr code showed exactly what I want,

>\```{r,echo=FALSE}  
>load("file_1.rdata")  
>print(table)  
>\```  
>\pagebreak  
>\```{r,echo=FALSE}  
>load("file_2.rdata")  
>print(table)  
>\```  
>\pagebreak  
>\```{r,echo=FALSE}  
>load("file_3.rdata")  
>print(table)  
>```  
>\pagebreak

But I have more than 60 files, it is really hard to write all the code by hand. I can write for loop in R block, however, how can I make a new page for each .rdata file?

The for loop will be

>\```{r,echo=FALSE}  
>names <- c("file_1.rdata","file_2.rdata","file_3.rdata")  
>for(i in 1:length(names)){  
>  current_object <- names[i]  
>   load(current_object)  
>  print(table)  
>}  
>\```  

Answer 1

You can try adding in cat("\\n\\n\\\\pagebreak\\n") inside your for loop, and results='asis' to your chunk call:

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

names <- c("file_1.rdata","file_2.rdata","file_3.rdata")
for(i in 1:length(names)){
   current_object <- names[i]
   load(current_object)
   print(table)
   cat("\n\n\\pagebreak\n")
}

```

It works for me with mtcars:

---
title: "test"
output: pdf_document
---

```{r, echo=FALSE, results='asis'}
for (i in 1:3) {
  print(mtcars)
  cat("\n\n\\pagebreak\n")
}
```

NB you might want to look into the function kable to format your tables more nicely. Or using library(xtable) :

```{r, echo=FALSE, results='asis'}
for (i in 1:3) {
  print(xtable::xtable(mtcars), type = "latex")
  cat("\n\n\\pagebreak\n")
}
```