#
# This is a Shiny web application. You can run the application by clicking
# the 'Run App' button above.
#
# Find out more about building applications with Shiny here:
#
#    http://shiny.rstudio.com/
#
#  Documentation: for Shiny 1.6
# https://shiny.rstudio.com/reference/shiny/1.6.0/

## Instructions:
## Build a shiny app from this simplified default template.

## 1. - Instead of old faithful geyser, generate a 1000 random values and plot this with a histogram.
## 2. change the title
## 3. Also plot the values you generated against the vals variable using a qqplot.
## 4. Add some other html using tags$ or one of the tags shortcuts

library(shiny)

##read the following in only once:
vals <- rnorm(5000)


# Define UI for application that draws a histogram
ui <- fluidPage(

    # Application title
    titlePanel("New title 2"),

     tags$p("Hellow", tags$em("world")),
     sliderInput("bins",
                        "Number of bins:",
                        min = 1,
                        max = 50,
                        value = 30),

    
    # Show a plot of the generated distribution
    plotOutput("distPlot")
    
)

# Define server logic required to draw a histogram
server <- function(input, output) {

    output$distPlot <- renderPlot({
        # generate bins based on input$bins from ui.R
        x    <- runif(1000)
        bins <- seq(min(x), max(x), length.out = input$bins + 1)
        par(mfrow=c(1,2))
        # draw the histogram with the specified number of bins
        hist(x, breaks = bins, col = 'darkgray', border = 'white')
        qqplot(x,vals)
    })
}

# Run the application 
shinyApp(ui = ui, server = server)