我是R的新手,并试图独自学习。
我想在一个闪亮的仪表板中创建一个选择字段,在那里我可以选择我的数据产品(.xls)并获得一笔总和。
输入是通过 selectInput 和选择。这是部分,有效:)
如果我选择1种产品,我将获得该产品的卡路里......到目前为止。
我的问题是想要选择更多的产品然后1并获得卡路里的总和。我如何识别/搜索表格中输入字段的产品,如何得到它的总和?
非常感谢你的帮助!
PS:您还需要有关文件的更多信息吗?只有两列对此很重要:产品和卡路里。
library(dplyr)
library(plotly)
library(readxl)
library(shiny)
library(shinydashboard)
# Daten einlesen
McDaten <- read_excel("~/Desktop/McDaten.xlsx")
McDaten$kcal <- McDaten$`kcal (100g)`
ui <- dashboardPage(
skin="red",
dashboardHeader(title = "Analytics Dashboard", titleWidth = 290),
dashboardSidebar(
width = 290,
sidebarMenu(
menuItem("Virtuelles Menü", tabName = "charts", icon = icon("cutlery"))
)
),
dashboardBody(
tabItems(
tabItem(tabName = "charts",
fluidPage(
br(),
fluidRow(
column(4,
selectInput('in6', 'Menü', McDaten$Produkt, multiple=TRUE, selectize=TRUE)),
column(4,infoBoxOutput("progressBox"))
)
)
))))
server <- function(input, output) {
output$progressBox <- renderInfoBox({
b <- McDaten %>%
select(`kcal (Portion)`, Produkt) %>%
filter(McDaten$Produkt %in% input$in6) %>%
summarise(`kcal (Portion)`)
infoBox(
"Progress", paste0(b, " kcal"), icon = icon("list"),
color = "purple", fill = TRUE
)
})
}
shinyApp(ui, server)
答案 0 :(得分:0)
我们需要&{39}中的choices = unique(McDaten$Produkt)
。并且在summarise
中需要为感兴趣的列指定sum
-ui
ui <- dashboardPage(
skin="red",
dashboardHeader(title = "Analytics Dashboard", titleWidth = 290),
dashboardSidebar(
width = 290,
sidebarMenu(
menuItem("Virtuelles Menü", tabName = "charts", icon = icon("cutlery"))
)
),
dashboardBody(
tabItems(
tabItem(tabName = "charts",
fluidPage(
br(),
fluidRow(
column(4,
selectInput('in6', 'Menü',
choices = unique(McDaten$Produkt), multiple=TRUE, selectize=TRUE )),
column(4,infoBoxOutput("progressBox"))
)
)
))))
-server
server <- function(input, output) {
output$progressBox <- renderInfoBox({
b <- McDaten %>%
select(`kcal (Portion)`, Produkt) %>%
filter(Produkt %in% input$in6) %>%
summarise(`kcal (Portion)` = sum(`kcal (Portion)`)) %>%
pull(`kcal (Portion)`)
infoBox(
"Progress", paste0(b, " kcal"), icon = icon("list"),
color = "purple", fill = TRUE
)
})
}
- 运行应用
shinyApp(ui, server)
-data
set.seed(24)
McDaten <- data.frame(Produkt = sample(LETTERS[1:5], 30, replace = TRUE),
`kcal (Portion)` = sample(1400:2000, 30, replace = TRUE),
stringsAsFactors= FALSE, check.names = FALSE)
McDaten$kcal <- McDaten$`kcal (Portion)`
-output