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我想根据数据子集在flexdashboard中绘制图表。下面是一个代码:基于flexdashboard中的数据子集绘制简单图表
---
title: "Test"
output:
flexdashboard::flex_dashboard:
orientation: columns
social: menu
source_code: embed
runtime: shiny
---
```{r global, include=FALSE}
library(flexdashboard)
library(ggplot2)
library(shiny)
A = c("A1", "A1", "A1", "A2", "A2", "A1", "A2", "A2")
B = c("B1", "B2", "B1", "B2", "B1", "B2", "B1", "B2")
x = c(1, 2, 3, 4, 5, 3, 3, 4)
y = c(5, 4, 3, 2, 1, 5, 3, 4)
df = data.frame(A, B, x, y, stringsAsFactors = FALSE)
```
Column
-------------------------------
### Select options
```{r}
selectInput("selectInput1", "Select A:",
choices = unique(df$A))
selectInput("selectInput2", "Select B:",
choices = unique(df$B))
```
```{r}
# Create a subset data frame
selectedData = reactive({
df[df$A == [email protected] & df$B == [email protected], c(3,4)]
})
```
Column
-------------------------------
###Chart
```{r}
renderPlot({
ggplot(selectedData(), aes(x = x, y = y)) +
geom_line() + ggtitle(paste0("Selected ", [email protected], " and ", [email protected]))
})
```
但我得到一个错误:试图从一个对象(类“reactivevalues”)获得槽“selectInput1”这不是一个S4对象
任何想法有做错了方式?以及如何使代码工作?
非常感谢!如此愚蠢的错误......但是,我仍然更喜欢在子集化阶段使用“&”而不是“&&”。 – Sergiy