如何基于闪亮的输入在管道中添加条件dySeries()调用

问题描述 投票:2回答:1

我正在使用@Jon_Spring提供的solution。我想根据选定的分类更改书形图的某些参数。一切都流经管道,所以我开始寻找advice on conditional evaluation using pipes

我的想法是在管道内使用{if }方法:

{if(input$diss=="Total") 
      dySeries("1", label = "All") else 
      dySeries("man", label = "Male") %>% 
      dySeries("woman", label = "Female")
    }

此步骤在调用dygraph()之后执行。我的想法是说“如果没有分类,请使用dySeries("1", label = "All"),否则请使用dySeries("man", label = "Male") %>% dySeries("woman", label = "Female")

但出现错误:

$运算符对原子向量无效

我是在正确的轨道上吗,还是有更好的方法根据输入来为图表创建条件绘图参数?

---
title: "test"
output: 
  flexdashboard::flex_dashboard:
    theme: bootstrap
runtime: shiny
---

```{r setup, include=FALSE}
library(flexdashboard)
library(tidyverse)
library(tibbletime)
library(dygraphs)
library(magrittr)
library(xts)
```

```{r global, include=FALSE}
# generate data
set.seed(1)
dat <- data.frame(date = seq(as.Date("2018-01-01"), 
                             as.Date("2018-06-30"), 
                             "days"),
                  sex = sample(c("male", "female"), 181, replace=TRUE),
                  lang = sample(c("english", "spanish"), 181, replace=TRUE),
                  age = sample(20:35, 181, replace=TRUE))
dat <- dplyr::sample_n(dat, 80)
```

Sidebar {.sidebar}
=====================================

```{r}

radioButtons("diss", label = "Disaggregation",
             choices = list("All" = "Total",
                            "By Sex" = "sex",
                            "By Language" = "lang"), 
             selected = "Total")
```

Page 1
=====================================

```{r plot}

renderDygraph({
  grp_col <- rlang::sym(input$diss)

  dat %>%
    mutate(Total = 1) %>% 
    mutate(my_group = !!grp_col) %>%
    group_by(date = lubridate::floor_date(date, "1 week"), my_group) %>%

    count() %>% spread(my_group, n) %>% ungroup() %>%
    padr::pad() %>% replace(is.na(.), 0) %>%

    xts::xts(order.by = .$date) %>%
    dygraph() %>%
    dyRangeSelector() %>%
    {if(input$diss=="Total") 
      dySeries("1", label = "All") else 
      dySeries("male", label = "Male") %>% 
      dySeries("female", label = "Female")
    } %>%
    dyOptions(
      useDataTimezone = FALSE, 
      stepPlot = TRUE,
      drawGrid = FALSE, 
      fillGraph = TRUE,
      colors = ifelse(input$diss=="Total", 
                      "blue",
                      c("purple", "orange"))
    )
})
```
r shiny dygraphs
1个回答
1
投票

埃里克!

我有一个类似的问题,这个方法为我解决了这个问题:

在{if}内,必须精确地指定管道中要通过dySeries的元素的位置,您可以通过在dySeries函数中放置一个点(。)来做到这一点。

代替您使用的,您可以尝试以下操作:

{if(input$diss=="Total") 
  dySeries(., "1", label = "All") else 
  dySeries(., "man", label = "Male") 
}%>% 
{if(input$diss=="Total")
  .
else
  dySeries(., "woman", label = "Female")
}

我将{if}分为两个条件评估,不知道它是否会起作用,但值得尝试。使用圆点时,不应出现问题中提到的错误。我有一个question about conditional evaluation by using pipes,并且可以通过类似的方式解决它,如果您想看看的话。

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