R Markdown : How do I make text float around figures?

Question

我使用R制作了流程图，并将其包含在R Markdown文件中。

现在的样子:


编码:

```{r flowchart-data, echo = FALSE, message = FALSE, fig.cap = "Ablauf der Datenverarbeitung", fig.align = "right",  fig.width = 7, fig.height = 6, out.extra = 'trim = {0 1.1cm 0 0}, clip', out.width=".7\\textwidth"}
library(grid)
library(Gmisc)

# grid.newpage()
# set some parameters to use repeatedly
leftx <- .2
midx <- .5
rightx <- .8

myBoxGrob <- function(text, ...) {
  boxGrob(label = text, bjust = "top", box_gp = gpar(fill = "lightgrey"), ...)
}

# create boxes
(Pharmazie <- myBoxGrob("Verbrauchsdaten von der\n Spitalpharmazie  (Excel-Tabelle)", x=leftx, y=1, width = 0.36))
(Finanzen <- myBoxGrob("Belegzahlen vom Ressort\n Finanzen (Excel-Tabelle)", x=rightx, y=1, width = 0.36))
(A <- myBoxGrob("Import der Daten aus Excel ins\n Microsoft Access (Datenbanksoftware)", x=midx, y=0.83, width = 0.45))
(B <- myBoxGrob("Zusammenführen der Informationen\n und erstellen neuer, berechneter Tabellen", x=midx, y=.66, width = 0.45))
(C <- myBoxGrob("Export der neu erstellten Tabellen\n in Form von Excel-Tabellen", x=midx, y=.49, width = 0.45))
(D <- myBoxGrob("Import der neuen Tabellen in R", x=midx, y=.32,  width = 0.45))
(E <- myBoxGrob("Berechnung und grafische Darstellung\n der Grafiken und Tabellen", x=midx, y=.19, width = 0.45))


connectGrob(Pharmazie, A, "L")
connectGrob(Finanzen, A, "L")
connectGrob(A, B, "N")
connectGrob(B, C, "N")
connectGrob(C, D, "N")
connectGrob(D, E, "N")
```

我想要的是:

我希望文本使用图左侧的空格。

我希望图形标题与图形的中心对齐。现在，标题位于页面的中间，而忽略图形是居中，右对齐还是左对齐。

我该如何实现这些目标？

编辑1:我想编织到pdf。

编辑2:按照评论中的要求，我的页面现在看起来如何:

Answer 1

有一个名为fig.env的块选项，使用该选项可以从figure切换到marginfigure环境。
不幸的是，可能的环境列表不包括wrapfigure。因此，我们将更改图块:

defOut <- knitr::knit_hooks$get("plot")  # save the default plot hook 
knitr::knit_hooks$set(plot = function(x, options) {  # set new plot hook ...
  x <- defOut(x, options)  # first apply the default hook
  if(!is.null(options$wrapfigure)) {  # then, if option wrapfigure is given ...
    # create the new opening string for the wrapfigure environment ...
    wf <- sprintf("\\begin{wrapfigure}{%s}{%g\\textwidth}", options$wrapfigure[[1]], options$wrapfigure[[2]])
    x  <- gsub("\\begin{figure}", wf, x, fixed = T)  # and replace the default one with it.
    x  <- gsub("{figure}", "{wrapfigure}", x, fixed = T)  # also replace the environment ending
  }
  return(x)
})

这些评论应阐明我们在这里实际所做的事情。注意， wrapfigure的期望值是两个元素的列表。第一个告诉LaTeX将图形移到页面的任一侧。第二个元素告诉LaTeX包装图形的宽度。若要将宽度为 0.7\\textwidth的图形移到右侧，请设置 wrapfigure = list("R", 0.7)(您可能已经猜到了， L将其移到左侧)。
现在我们要做的就是在YAML中包括 wrapfig包，并设置此chunk选项。这是一个可重现的示例:

---
header-includes:
  - \usepackage{wrapfig}
  - \usepackage{lipsum}
output: 
  pdf_document:
    keep_tex: true
---

```{r, include = F}
defOut <- knitr::knit_hooks$get("plot")  # save the default plot hook 
knitr::knit_hooks$set(plot = function(x, options) {  # set new plot hook ...
  x <- defOut(x, options)  # first apply the default hook
  if(!is.null(options$wrapfigure)) {  # then, if option wrapfigure is given ...
    # create the new opening string for the wrapfigure environment ...
    wf <- sprintf("\\begin{wrapfigure}{%s}{%g\\textwidth}", options$wrapfigure[[1]], options$wrapfigure[[2]])
    x  <- gsub("\\begin{figure}", wf, x, fixed = T)  # and replace the default one with it.
    x  <- gsub("{figure}", "{wrapfigure}", x, fixed = T)  # also replace the environment ending
  }
  return(x)
})
```


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```{r echo = F, warning = F, message = F, fig.width=7, fig.height = 6, out.width = ".7\\textwidth", fig.cap = "My Flowchart", fig.align="right", wrapfigure = list("R", .7)}
plot(mpg ~ hp, data = mtcars)
```

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请注意，该解决方案很可能仅适用于创建单个图的块。应该可以将其扩展到包含多个图形的块。