为什么html中的visnetwork图表布局太小

Question

当我渲染下面的示例-Rmd时，它看起来像这样（使用Chrome，与Firefox没有什么区别）：

这个数字太小了，如果我看看＆＃34;真实＆＃34;我需要的图表，高度太小，比例高度 - 宽度更差。

以下是可重现的示例：

---
title: "Untitled"
author: "author"
date: "9 Mai 2018"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## Example

Here is a line of text...................................................................................................................................................................................................................................................................

```{r echo=FALSE}
require(visNetwork, quietly = TRUE)
# minimal example
nodes <- data.frame(id = 1:20)
edges <- data.frame(from = sample(c(1:20), 10), to = sample(c(1:20), 10))
visNetwork(nodes, edges, width = "100%", height = "100%") %>%
                               visNodes() %>%
                               visOptions(highlightNearest = TRUE) %>%
                               visInteraction(navigationButtons = TRUE, 
                                              dragNodes = FALSE,
                                              dragView = FALSE, zoomView = FALSE) %>%
                               visEdges(arrows = 'to')
```

Here is another line of text....................................................................................................................................................................................................................................................................

Answer 1

我希望使用一些块选项修复它，例如out.height或fig.height，但出于某种原因，他们不会。

但是，您可以为窗口小部件本身设置固定高度，只需将数字传递给将被解释为像素的height参数：

```{r echo=FALSE}
require(visNetwork, quietly = TRUE)
# minimal example
nodes <- data.frame(id = 1:20)
edges <- data.frame(from = sample(c(1:20), 10), to = sample(c(1:20), 10))
visNetwork(nodes, edges, width = "100%", height = 700) %>%
                               visNodes() %>%
                               visOptions(highlightNearest = TRUE) %>%
                               visInteraction(navigationButtons = TRUE, 
                                              dragNodes = FALSE,
                                              dragView = FALSE, zoomView = FALSE) %>%
                               visEdges(arrows = 'to')
```