R help - Jul 2015 - Building Intercative Dashboard using shiny in R

Hi All,

I have just begun working on shiny package in R and have been building a
dashboard using tutorials and documentation abvailable online. I  am stuck
in the middle.

It would be of great help if you could help me out with my code. I want to
build a dashboard that would take 'date range' and 'variable' to
be
displayed as user input and then display the plot. It takes the data from
the csv file.

Currently, the issue is when I change the variable the plot gets changed
but when I change date range, nothing happens to the plot. Please help me
out with this. I have posted the question in stackoverflow as well. Here's
the link: question
<http://stackoverflow.com/questions/31246498/plots-dont-change-with-changing-dates-in-shiny-dashborad-in-r>


Here is the source code:

*ui.R*

library("shiny")
library("shinydashboard")
dashboardPage(

dashboardHeader(title = "Dashboard"),

dashboardSidebar(img(src="jpeg.jpg", length = 75, width = 230),
               dateRangeInput("daterange", "Select Date
range:",
                              start = "2014-06-01",
                              end = "2015-06-30"),
               selectInput("var", "Choose a variable to
display",
                           choices = c('Total_Orders' =
'Total_Orders',
                                       'Delivered_orders' =
'Delivered_orders',
                                       'Cancelled_orders' =
'Cancelled_orders',
                                       'NEW_USERS_COUNT' =
'NEW_USERS_COUNT'),
                           selected = "Total_Orders")

               ),
dashboardBody(

fluidRow(
  box(title = "plot", status = "primary", solidHeader =
TRUE,
      collapsible = TRUE, plotOutput("chart1", height = 250, width =
500))
  )
  ))


*server.R:*

library("shiny")
library("data.table")
file <-     read.csv('filepath.csv', header = TRUE)
setnames(file, old = c('X_id'), new = c('date'))
file$date <- as.Date(strptime(file$date, "%Y-%m-%d" ))

shinyServer(function(input, output)
{output$chart1 <- renderPlot({

               start_date <- input$daterange[1]
               end_date <- input$daterange[2]

               subset(file, date >= start_date & date   <= start_date)

               point <- switch(input$var,
               'Total_Orders' = file$Total_Orders,
               'Cancelled_orders' = file$Cancelled_orders,
               'Delivered_orders' = file$Delivered_ordes,
               'NEW_USERS_COUNT' = file$NEW_USERS_COUNT
               )
               plot(file$date, point, type = "b")
 }) })





?*Sample Data:*

Date        Total_Orders   Delivered_orders   Cancelled_orders
NEW_USERS_COUNT 2015-04-30     23             12               2
           212015-05-01     43             21               12
        322015-05-02     32             13               10
     302015-05-03     43             32               7
  142015-05-04     43             22               3
212015-05-05     32             21               1                  22


?Thanks in advance :)

Thanks!?

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