使用选择框通过 R 中的串扰在 R 绘图中选择默认值,使用静态 html 不闪亮 [英] Selecting a default value in an R plotly plot using a selectize box via crosstalk in R, using static html not shiny
问题描述
在 Rmarkdown html 文档中,如何为可用于绘图的串扰::filter_select 下拉列表选择默认值?例如,在下面的示例中,在编织 RMD 时仅选择组a".
In an Rmarkdown html document, how does one select a default value for a crosstalk::filter_select dropdown that will work with plotly plots? E.g., in the example below, to have just group 'a' selected when the RMD is knitted.
我知道对于下面的示例,使用绘图按钮会更容易,但是当有超过 4-5 个左右的选择时,绘图下拉菜单/按钮占用太多空间/非常难看.也希望避免运行闪亮的服务器,这个想法是为了速度目的让所有东西都在客户端运行.
I know that for the reprex below example using plotly buttons would be easier, but when there are more than 4-5 or so choices the plotly dropdowns/buttons take up too much room/are quite ugly. Also hoping to avoid running a shiny server, the idea is to have everything running client side for speed purposes.
串扰中有一个 PR 增加了默认选择";filter_select 函数的参数,但该版本不适用于 plotly (https://github.com/rstudio/crosstalk/pull/70).我想最简单的方法是在文档中添加 javascript 来操作串扰对象,但一些实验还没有进行得很远.
There is a PR in crosstalk that adds a "default choice" argument to the filter_select function, but that version doesn't work with plotly (https://github.com/rstudio/crosstalk/pull/70). I would guess the easiest way would be to add javascript to the doc to manipulate the crosstalk object, but a few experiments haven't gotten very far yet.
Reprex rmd:
Reprex rmd:
---
output:
html_document
---
```{r echo=FALSE, message=FALSE, warning=FALSE}
library(plotly)
# example data
dat <- tibble::tribble(~filterBy, ~x, ~y,
"a", 1, 1,
"b", 2, 1,
"a", 1, 2,
"b", 2, 2,
"a", 1, 3,
"b", 2, 3,
"a", 1, 2,
"b", 2, 3,
"c", 3, 1,
"c", 3, 2,
"c", 3, 3
)
# initializing a crosstalk shared data object
plotdat <- highlight_key(dat)
# Filter dropdown
question_filter <- crosstalk::filter_select(
"filter", "Select a group to examine",
plotdat, ~filterBy, multiple = F
)
# Plotting:
plot <- plot_ly( plotdat,
x = ~x, y = ~y, text = ~filterBy, mode = "markers+text",
textposition = "top", hoverinfo = "x+y"
)
# Just putting things together for easy display:
shiny::tags$div(class = 'flexbox',
question_filter,
shiny::tags$br(),
plot)
```
推荐答案
您可以使用 javascript 直接操作串扰 filter_select
输出的选择框,技巧是在加载时触发它,如下所示:>
You can directly manipulate the selectize boxes that crosstalk filter_select
ouputs using javascript, the trick is triggering it on load like so:
```{js}
function filter_default() {
document.getElementById("filter").getElementsByClassName("selectized")[0].selectize.setValue("a", false);
}
window.onload = filter_default;
```
这篇关于使用选择框通过 R 中的串扰在 R 绘图中选择默认值,使用静态 html 不闪亮的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!