"Object not found"

shiny
, ,
1

Hi, I'm having difficulty running this code i learnt online. It seems to sho
Remark was "SP.POP.TL" not found and then "Year" Not found.

I'm quite new, and i've uploaded the dataset on R just to make sure the server can read it.

## reference code for UI.R and Server.R

# from code to name
codeToName <- c(
  SP.POP.TOL = "Total Population",
  happiness.index = "Happiness Index",
  gdp.per.capita = "GDP per capita",
  social.support = "Social Support",
  life.expectancy = "Life Expectancy",
  generosity = "Generosity",
  perception.of.corruption = "Perception of Corruption",
  confidence.national.government = "Confidence in National Government",
  democratic.quality= "Democratic Quality",
  delivery.quality = "Delivery Quality"
)

# from name to code
nameToCode <- names(codeToName)
names(nameToCode) <- codeToName

# server side
library(shiny)
library(ggplot2)

bubbleChart <- function(X,x,y,radius,colour, alpha = 0.6){
  
  p <- ggplot(X,aes_string(x = x, y = y )) + 
    geom_point(aes_string(size = radius, colour = colour), alpha = alpha) +
    geom_point(aes_string(size = radius), colour = 'black', alpha = 1, shape = 1 ) +
    guides(colour = guide_legend(override.aes = list(alpha = 1, size = 5)))
  p  
}

whr <- read.csv(file="C:./shinyapp/WHRO.csv",sep="\t",header=TRUE)

shinyServer(function(input, output){
  
  output$bubbleChart <- renderPlot({    
    p <- bubbleChart(
      subset(whr, "Year"==input$year),
      x = input$xAxis,
      y = input$yAxis,
      radius = "SP.POP.TL",
      colour = "continent") 
    
    p <- p + scale_color_brewer(type="qual",palette='Set1') +
      guides(size = guide_legend(title = codeToName['population'])) +
      xlab(codeToName[input$xAxis]) +
      ylab(codeToName[input$yAxis]) +
      scale_size_area(max_size=14) +         
      ggtitle(paste("Year: ",input$year))
    
    print(p)
  })

  
  
}


)

# UI for the bubbleChart

library(shiny)


shinyUI(
  pageWithSidebar(
    headerPanel("Happiness Index Over Time"),
    
    sidebarPanel(
      h1("Interactive bubble chart"),
      sliderInput(
        "year", "Select a year:",
        min = 1997, max = 2017, 
        step = 1, value = 2000, format = "####",
        animate=TRUE),
      selectInput("xAxis","Select the first variable:", choices = nameToCode, selected = "Happiness Index"),
      selectInput("yAxis","Select the second variable:", choices = nameToCode, selected = "GDP per capita")
    ),
    
    mainPanel(
      plotOutput("bubbleChart")
    )
  )
  
)