r - 在 flexdashboard 中自动调整 ggplot2 图的大小

Question

我有一个只有一个框架的 flexdashboard。现在我遇到了两个问题:

首先，如何更改框架标题(“示例”)的大小？

其次，仪表板会在浏览器中自动调整大小。但是，ggplot2 图没有。我如何告诉 flexdashboard 自动调整此图的大小？

---
title: "Resize ggplot2 Plots in FlexDashboard"
output: 
  flexdashboard::flex_dashboard:
    storyboard: true
    theme: lumen
    social: menu
    source: embed
---

```{r setup, include=FALSE}
require(flexdashboard)
require(ggplot2)
df <- data.frame(year = c("2013", "2014", "2015", "2013", "2014", "2015", "2013", "2014", "2015"),
                 cat = c("A", "A", "A", "B", "B", "B", "C", "C", "C"),
                 freqA = c(100, 100, 110, 80, 80, 90, 90, 90, 100),
                 freqB = c(50, 50, 55, 40, 40, 45, 45, 45, 50))
```

### Example

```{r}
ggplot(df, aes(x = year, weight = freqA)) +
        geom_bar(position="dodge", alpha = .2, width=.5) + 
        # add and overlay elements
        geom_bar(aes(x = year, weight = freqB, fill = cat),
                 position = "dodge", width=.5) +
        scale_fill_manual(values = c("#6baed6", "#fb6a4a", "#238b45")) +
        # add hlines for waffle-design
        geom_hline(yintercept=seq(0, 120, by = 10), col = 'white') +
        # facet display - 1 row, 3 columns
        facet_grid(. ~ cat) +
        # delete labels of x- and y-axis
        xlab("") + ylab("") +
        # blank background and now grids and legend
        theme(panel.grid.major.x = element_blank(), panel.grid.major.y = element_blank(),
              panel.grid.minor.y = element_blank(),
              panel.background = element_blank(), legend.position = "none",
              axis.text.x = element_text(angle = 0, hjust = 0.5))
```


***

Problem:

- How can I tell flex dashboard to automatically resize the ggplot2 Plot?

- The plot should fill the whole space!

Answer 1

feder80，我只是从“flexdashboard”开始，但是使用列而不是 Storyboard 布局怎么样？然后您可以设置列的大小，它似乎对大小调整更敏感(但它不会拉伸(stretch)图表到每个角落)。

参见:

• 列宽或设置深度:http://rmarkdown.rstudio.com/flexdashboard/using.html#sizing

• 其他布局:http://rmarkdown.rstudio.com/flexdashboard/using.html#orientation

这些页面注意到“默认情况下，仪表板中的 2 级 Markdown 标题 (----------------) 定义列，每个图表垂直堆叠专栏。”

请注意有特殊的 mobile layout defaults如果您在尺寸受限的较小屏幕上查看此内容。

代码

---
title: "Resize ggplot2 Plots in FlexDashboard v2"
output: 
  flexdashboard::flex_dashboard:
    theme: lumen
    social: menu
    source: embed
---

```{r setup, include=FALSE}
require(flexdashboard)
require(ggplot2)
df <- data.frame(year = c("2013", "2014", "2015", "2013", "2014", "2015", "2013", "2014", "2015"),
                 cat = c("A", "A", "A", "B", "B", "B", "C", "C", "C"),
                 freqA = c(100, 100, 110, 80, 80, 90, 90, 90, 100),
                 freqB = c(50, 50, 55, 40, 40, 45, 45, 45, 50))
```

Column1
-------

### Example


```{r}


  ggplot(df, aes(x = year, weight = freqA)) +
    geom_bar(position="dodge", alpha = .2, width=.5) + 
    # add and overlay elements
    geom_bar(aes(x = year, weight = freqB, fill = cat),
             position = "dodge", width=.5) +
    scale_fill_manual(values = c("#6baed6", "#fb6a4a", "#238b45")) +
    # add hlines for waffle-design
    geom_hline(yintercept=seq(0, 120, by = 10), col = 'white') +
    # facet display - 1 row, 3 columns
    facet_grid(. ~ cat) +
    # delete labels of x- and y-axis
    xlab("") + ylab("") +
    # blank background and now grids and legend
    theme(panel.grid.major.x = element_blank(), panel.grid.major.y = element_blank(),
          panel.grid.minor.y = element_blank(),
          panel.background = element_blank(), legend.position = "none",
          axis.text.x = element_text(angle = 0, hjust = 0.5))

```


Column2{data-width=200}
-------

Problem:

- How can I tell flex dashboard to automatically resize the ggplot2 Plot?

- The plot should fill the whole space!

使用不同浏览器窗口大小的图片

它不是很明显，但是你可以从右边的文字中看出这些是不同数量的像素宽。