Scatter plots for different variables in a single shiny app - r

Question

I use R shiny to create multiple tabs for the scatter plot of different variables in a single app. My code seems alright, but the error says I have not "defined my main panel."
Can someone please help where I have gone wrong, or if my whole approach is inaccurateenter code here, please let me know!
library(shiny)
library(tidyverse)
India <- read.csv("D:/R/Practice 3/Indiadata.csv")
# Define UI for application that draws a histogram
ui <- fluidPage(
# Application title
titlePanel("Deaths vs all variables "),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
selectInput("Deaths", "All variables:",
choices = c("cases"="total_cases","vaccinations"="total_vaccinations",
"people vaccinated"="people_vaccinated","people fully vaccinated"="people_fully_vaccinated",
"total booster"="total_boosters","new vaccinations"="new_vaccinations", "median age"="median_age"))
)
),
mainPanel(
tabsetPanel(type = "tabs",
tabPanel(plotOutput("plot1")),
tabPanel(plotOutput("plot2")),
tabPanel(plotOutput("plot3")),
tabPanel(plotOutput("plot4")),
tabPanel(plotOutput("plot5")),
tabPanel(plotOutput("plot6")),
tabPanel(plotOutput("plot7"))
)
)
)
# Define server logic required to draw a histogram
server <- function(input, output) {
output$plot1 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=total_cases))
})
output$plot2 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=total_vaccinations))
})
output$plot3 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=people_vaccinated))
})
output$plot4 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=people_fully_vaccinated))
})
output$plot5 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=total_boosters))
})
output$plot6 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=new_vaccinations))
})
output$plot7 <- renderPlot({
ggplot(India,aes(y=total_deaths,x=median_age))
})
}
# Run the application
shinyApp(ui = ui, server = server)

Answer 1

mainPanel is an argument of the sidebarLayout() function. So, you just need to move it up into the sidebarLayout() function:
ui <- fluidPage(
# Application title
titlePanel("Deaths vs all variables "),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
selectInput("Deaths", "All variables:",
choices = c("cases"="total_cases","vaccinations"="total_vaccinations",
"people vaccinated"="people_vaccinated","people fully vaccinated"="people_fully_vaccinated",
"total booster"="total_boosters","new vaccinations"="new_vaccinations", "median age"="median_age"))
),
mainPanel(
tabsetPanel(type = "tabs",
tabPanel(plotOutput("plot1")),
tabPanel(plotOutput("plot2")),
tabPanel(plotOutput("plot3")),
tabPanel(plotOutput("plot4")),
tabPanel(plotOutput("plot5")),
tabPanel(plotOutput("plot6")),
tabPanel(plotOutput("plot7"))
)
)
)
)