在 flexdashboard 中自动调整 ggplot2 绘图的大小

Question

我有一个带有一个框架的 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？

第二，仪表板会在浏览器中自动调整大小。但是， ggplot2 图没有。如何告诉 flexdashboard 自动调整该图的大小？

---
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's 开始，但 如何使用列而不是情节提要布局？ 然后您可以设置列的大小，它似乎对大小更敏感（但它不会拉伸图表到每个角落）。

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 级降价标题 (-----------------) 定义列，每个图表中垂直堆叠列。”

请注意，如果您在限制尺寸的较小屏幕上查看此内容，请注意有特殊的mobile layout defaults。

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

这不是很明显，但你可以从右边的文字中看出这些是不同数量的像素宽。

Answer 2

首先，调整标题的大小。不幸的是，故事板布局在您可以在 R 代码的主要部分中指定的选项方面不太通用。但是，您可以使用 markdown 文档中的 css 代码覆盖默认设置。我已经调整了此处提供的代码：Modify Flexdashboard CSS in R 以适合您的问题（见下文）。

第二，调整图表大小。在代码中使用 fig.width = 12, fig.height= 5 规范将允许您调整绘图的大小，并在较小时调整大小（尽管并不总是完全适合盒子）。如果符合目的，plotly 在图表大小方面可能比 ggplot2 提供更多。

  ---
title: "Resize ggplot2 Plots in FlexDashboard"
output: 
  flexdashboard::flex_dashboard:
    storyboard: true
    theme: lumen
    social: menu
    source: embed
---
Some commentary about Frame 1.

```{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,fig.width = 12, fig.height= 5}

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!


```{css css_formatting}
.storyboard-nav {
    box-sizing: border-box;
    width: 100% !important; /* This prevents JS transformation on width */
    height: auto; /* This overrides the height */
}

.storyboard-nav .sbnext, .storyboard-nav .sbprev {
    height: auto; /* This overrides the height */
    font-size: 3rem; 
}

.storyboard-nav .sbframelist {
    height: auto; /* This overrides the height */
}

.storyboard-nav .sbframelist ul {
    box-sizing: border-box;
    width: 100% !important; /* This prevents JS transformation on width */
    height: auto; /* This overrides the height */
}

.storyboard-nav .sbframelist ul li {
    height: auto; /* This overrides the height */
    width: auto; /* This overrides the width */
    font-size: 6rem;/* This determines the size of the text in the box */
}


```