R针织衫在一个循环中打印 [英] R knitr print in a loop

问题描述

我一直在使用xtable包从R矩阵中创建HTML表.当我在循环中使用函数kable时，它没有输出任何内容.所以我盯着使用print函数，它起作用了.问题是，当我使用打印功能时，我在表格HTML上打印了很多"##".有没有一种方法可以打印我的电缆，但是在循环时避免每行显示"##"?

I've been using the xtable package to create HTML tables out of R matrices. When I used the function kable in a loop, it didn't output anything. So I stared using the print function, which worked. The problem is that when I use the print function I get lots of "##" printed along the table HTML. Is there a way to print my kable but avoiding the "##" per line while in a loop?

library("xtable", lib.loc="~/R/win-library/3.1")

for(i in 1:3) {
    #Must use print because of the loop, but get ## per line
    print(kable(head(cars), "html", table.attr='class="flat-table"'))
}
#No neded to use print, no ## printed per line
kable(head(cars), "html", table.attr='class="flat-table"')

推荐答案

您应该告诉数据块按原样使用结果.

You should tell the chunk to use results as-is.

通过在块标题中添加results='asis'来完成此操作.

Do this by adding results='asis' to your chunk header.

尝试一下:

```{r, results='asis', echo=FALSE}
library(knitr)
library(xtable)

for(i in 1:3) {
  #Must use print because of the loop, but get ## per line
  print(kable(head(cars), "html", table.attr='class="flat-table"'))
}
```

---

你应该得到

---

You should get

speed    dist
4    2
4    10
7    4
7    22
8    16
9    10

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