图标题，使用knitr和markdown到html的引用 [英] figure captions, references using knitr and markdown to html

问题描述

我正在编写一个Rmd文件，该文件将由knitr处理为HTML.它包含一些R块，这些块可以生成图形，然后将其存储为HTML中的数据URI.

I'm writing an Rmd file, to be processed by knitr into HTML. It contains some R chunks that generate figures, which get stored as data URIs in HTML.

1)如何为此类图像添加标题?我想要一个标题，上面写着类似图3:等等等等"的标题，其中会自动生成"3".

1) How do I add a caption to such an image? I'd like to have a caption that says something like "Figure 3: blah blah blah", where the "3" is automatically generated.

2)以后我该如何参考该图像，即如图3所示，等等".

2) How do I later on reference this image, i.e., "as you can see in Figure 3, blah blah".

推荐答案

1. 您可以在R中使用一个简单的计数器来创建图形编号；请参见此处的一个示例.问题是markdown渲染器是否会为您渲染图形标题:R Markdown v1不会，但 v2 (基于Pandoc).
2. 我不知道.没有直接的方法可以插入标签作为图形的标识符，因此可能无法使用纯Markdown来交叉引用图形.一旦遇到此类问题，请思考(1)我真的需要吗? (2)如果打算成为结构复杂的文档，我认为最好直接使用LaTeX(Rnw文档).

1. You can create the figure numbers with a simple counter in R; see one example here. The problem is whether the markdown renderer will render the figure caption for you: R Markdown v1 won't, but v2 (based on Pandoc) will.
2. I do not know. There is no direct way to insert a label as an identifier for figures, so it is probably not possible to cross reference figures with pure Markdown. Once you've got issues like this, think (1) do I really need it? (2) if it is intended to be a document with a complicated structure, I think it is better to use LaTeX directly (Rnw documents).

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