1

我正在尝试使用 vegalite 在 sweeve/knitr 中显示一些图，但我得到的只是一个没有图的空白区域。

我的代码如下，它基于一个教程示例：

---
title: "VegaLite test"
output: html_notebook
---

```{r}
library(vegalite)
library(magrittr)    
```

```{r barplot, fig.width=8, fig.height=6}

dat <- jsonlite::fromJSON('[
    {"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
    {"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
    {"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
  ]')

vegalite() %>%
  add_data(dat) %>%
  encode_x("a", "ordinal") %>%
  encode_y("b", "quantitative") %>%
  mark_bar() -> vl

vl
```

我在用：

> packageVersion("vegalite")
[1] ‘0.7.1’
> packageVersion("magrittr")
[1] ‘1.5’    
> packageVersion("knitr")
[1] ‘1.15.1’

RStudio: Version 1.0.136 

> R.version
               _                           
platform       x86_64-w64-mingw32          
arch           x86_64                      
os             mingw32                     
system         x86_64, mingw32             
status                                     
major          3                           
minor          3.3                         
year           2017                        
month          03                          
day            06                          
svn rev        72310                       
language       R                           
version.string R version 3.3.3 (2017-03-06)
nickname       Another Canoe

我想知道我应该怎么做才能看到正确显示的数据

4

1 回答 1

0

我已经尝试了您的示例，令人惊讶的是，该图出现在查看器面板中，而不是在绘图面板中。因此，添加runtime: shiny到您的 YAML 标头：

---
title: "VegaLite test"
output: html_notebook
runtime: shiny
---
于 2017-03-17T06:57:16.503 回答