在RStudio中循环新幻灯片

Question

我正在尝试在新的和漂亮的预览版本的RStudio（.rpres）中自动生成幻灯片。以下代码生成幻灯片，但图表不会显示在幻灯片3及更高版本上。如何包含这些地块？

My First Presentation
========================================================
author: Me
date: Now

Slide 1
========================================================
This is plot 1

```{r, echo=FALSE}
tmp.cars <- cars
tmp.cars$dist <- tmp.cars$dist*1  # Multiplied by 1 because slide 1
plot(tmp.cars)
```

Slide 2
========================================================
This is plot 2

```{r, echo=FALSE}
tmp.cars <- cars
tmp.cars$dist <- tmp.cars$dist*2  # Multiplied by 2 because slide 2
plot(tmp.cars)
```

```{r loop, echo=FALSE, results='asis'}
for(i in 3:10) {
  cat(paste("Slide ", i, "\n", sep=""))
  cat("========================================================\n")
  cat(paste("This is plot ", i, "\n\n", sep=""))
  tmp.cars <- cars
  tmp.cars$dist <- tmp.cars$dist*i  # Multiplied by i because slide i
  plot(tmp.cars)
}
```