pdf，docx，html输出中的书本中一致的数学方程式编号 [英] Consistent math equation numbering in bookdown across pdf, docx, html output

问题描述

在书本中，有一个LaTeX数学环境可以为每个方程式编号，而不管输出是.pdf，.docx，.html还是?添加此 LaTeX:

  \ begin {align}X&= Y \\Z& = W\ end {align} 

在

DOCX :缺少方程式编号.

HTML:缺少等式编号.

注意:

• 使用 pdf_book ， word_document2 ， gitbook 生成输出.
• 这与我的未解决问题有关:

  PDF输出类似.在LibreOffice中看到的字输出非常糟糕，但是方程式编号(包括引用)在那里.所以我想这是本地的或LibreOffice特定的问题.

  In bookdown, is there a LaTeX math environment which numbers each equation, regardless of whether the ouptut is .pdf, .docx, .html? Adding this LaTeX:

  \begin{align}
     X &= Y \\
     Z &= W
  \end{align}
  

  Into the bookdown-demo outputs the following:

  PDF: works as expected.

  DOCX: missing equation numbers.

  HTML: missing equation numbers.

  Notes:

  • The output was generated using pdf_book, word_document2, gitbook.
  • This is related to an unanswered question of mine: Align environment in R Markdown which works for both docx and pdf output?

  UPDATE: Merging Ralf's answer below along with other learnings of mine, in bookdown, the following all work consistently and as expected across .pdf, .docx, .html output.

  Add a single un-numbered equation:
  
  \begin{equation*}
    X = Y
  \end{equation*}
  
  Add a single numbered equation:
  
  \begin{equation}
    X = Y
    (\#eq:eq02)
  \end{equation}
  
  I refer to previous, equation \@ref(eq:eq02).
  
  Add multiple un-numbered equations:
  
  \begin{align*}
    X &= Y \\
    Z &= W   
  \end{align*}
  
  Add multiple equations with numbering for each:
  
  \begin{align}
    X &= Y (\#eq:eq05)\\
    Z &= W (\#eq:eq06)  
  \end{align}
  
  I refer to previous, equation \@ref(eq:eq05) and equation \@ref(eq:eq06).
  
  Add multiple equations with a single numbering for all:
  
  \begin{equation}
     \begin{aligned}
        X &= Y \\
        Z &= W   
     \end{aligned}
     (\#eq:eq04)
  \end{equation}
  
  I refer to previous, equation \@ref(eq:eq04).
  

  解决方案

  For equation numbering support in bookdown you need to assign labels. the following works for me:

  ---
  output:
    bookdown::html_document2: default
    bookdown::word_document2: default
    bookdown::pdf_document2: default
  ---
  
  ```{r setup, include=FALSE}
  knitr::opts_chunk$set(echo = TRUE)
  ```
  
  \begin{equation}
  \begin{aligned}
    X &= Y \\
    Z &= W
  \end{aligned}
  (\#eq:eq1)
  \end{equation}
  
  \begin{align}
    X &= Y (\#eq:eq2) \\
    Z &= W (\#eq:eq3)
  \end{align}
  
  
  See Equation \@ref(eq:eq1) or Equations \@ref(eq:eq2) and \@ref(eq:eq3).
  

  HTML Output:

  PDF output is similar. Word output as seen in LibreOffice is pretty bad, but the equation numbers including references are there. So I guess this is a local or LibreOffice specific problem.

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