reproducible-research-quiz2

Week 2 Quiz

已通过

4/5 得分（80%)

测验通过！

正确

1 / 1 分

1. 

Who created Markdown?

John Gruber

正确回答 

Yihui Xie

Hadley Wickham

Robert Gentleman

正确

1 / 1 分

2. 

When writing a document in R Markdown, how do you denote the beginning of an R code chunk?

```{r}

正确回答 

<code>

```

<rcode>

错误

0 / 1 分

3. 

When using knitr, how do you indicate the height and width of a plot created in a code chunk?

Set the 'size' and 'scale' options for the code chunk

Set the 'dpi' option for the code chunk

不正确回答 

Set the 'height' and 'width' options for the code chunk

Set the 'fig.height' and 'fig.width' options for the code chunk  (正确答案应为此项)

正确

1 / 1 分

4. 

With some code chunks, we may not want the output generated by the chunk to be rendered into HTML but would prefer to print the output verbatim. How can we specify this preference for a given code chunk?

Set the option results = "asis"

正确回答 

Set the option tidy = FALSE

Set the option message = FALSE

Set the option highlight = TRUE

正确

1 / 1 分

5. 

When using knitr and R Markdown and producing output in HTML, why should you never edit the resulting HTML file?

The HTML file is not a text file.

The Markdown file generated by knitr is the appropriate file to edit.

Editing the HTML file requires knowledge of a separate markup language.

Every time you knit() the R Markdown file, the HTML file will be overwritten

正确回答