ggplot和闪亮 - 情节不​​出现 [英] ggplot and Shiny -- plots not appearing

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本文介绍了ggplot和闪亮 - 情节不​​出现的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有以下ui.R

 库(闪亮)
库(随时)

x< -read.csv(reddit_data_by_month.csv,header = T)
x [date]< -anydate(x $ month)

shinyUI(fluidPage (

#应用程序标题
title =Reddit数据按月,

plotOutput(图表),

hr ),

fluidRow(
列(6,
)dateRangeInput(dates,label = h2(Date Range),start = x $ date [1],end = x $ date [142],min = x $ date [1],max = x $ date [142],format =mm / yyyy,startview =year)

),
列(6,
checkboxGroupInput(checkGroup,label = h2(Data Sets),
choices = list(Accounts Created= 1,Comments= 2,提交= 3,Votes= 4),
selected = NULL)
#NULL




和下面的server.R



<$ p $
library(ggplot2)
library(随时)
library(dplyr)

x <-read.csv (reddit_data_by_month.csv,header = T)
x [date]< -anydate(x $ month)

shinyServer(function(input,output){

subsetData< - reactive({
newData< - subset(x,date> as.Date(输入$ dates [1])& as.Date(日期)< as.Date(输入$ dates [2]))
return(newData)
})


输出$ graph< - renderPlot({

reactive({
graph< - ggplot()

if(grepl(1,input $ checkGroup)){
graph + geom_line = subsetData(),aes(x = date,y = accounts_created,color =red))
}
})

})
$ b $我的数据是




我的数据是 $ p> structure(list(month = structure(1:142,.Label = c(2005-06,
2005-07,2005-08,2005 -09,2005-10,2005-11,2005-12,
2006-01,2006-02,2006-03,2006-04, 2006-05,2006-06,
2006-07,2006-08,2006-09,2006-10,2006-11,2006-12 ,
2007-01,2007-02,2007-03,2007-04,2007-05,2007-06,
2007-07 ,2007-08,2007-09,2007-10,2007-11,2007-12,
2008-01,2008-02,2008 -03,2008-04,2008-05,2008-06,
2008-07,2008-08,2008-09,2008-10, 2008-11,2008-12 ,
2009-01,2009-02,2009-03,2009-04,2009-05,2009-06,
2009-07 ,2009-08,2009-09,2009-10,2009-11,2009-12,
2010-01,2010-02, 03,2010-04,2010-05,2010-06,
2010-07,2010-08,2010-09,2010-10, 2010-11-12,2010-12,
2011-01,2011-02,2011-03,2011-04,2011-05,2011-06 ,
2011-07,2011-08,2011-09,2011-10,2011-11,2011-12,
2012-01 ,2012-02,2012-03,2012-04,2012-05,2012-06,
2012-07,2012-08, 09,2012-10,2012-11,2012-12,
2013-01,2013-02,2013-03,2013-04, 2013-05,2013-06,
2013-07,2013-08,2013-09,2013-10,2013-11,2013-12 ,
2014-01,2014-02,2014-03,2014-04,2014-05,2014-06,
2014-07 ,2014-08,2014-09,2014-10,2014-11,2014-12,
2015-01,2015-02, 03,2015-04,2015-05,2015-06,
2015-07,2015-08,2015-09,2015-10, 2015-11, 2015-12,
2016-01,2016-02,2016-03,2016-04,2016-05,2016-06,
2016-07,2016-08,2016-09,2016-10,2016-11,2016-12,
2017-01,2017-02 ,2017-03),class =factor),accounts_created = c(48L,
218L,661L,523L,587L,1385L,3175L,3694L,4828L,6907L,6100L,
7331L ,9847L,9182L,13517L,14172L,15607L,20457L,13691L,
35775L,23302L,25936L,29160L,44229L,28057L,31420L,35582L,
35225L,62448L,28496L,27419L,33332L,30771L ,33643L,31474L,
37465L,40301L,41403L,38573L,43099L,44447L,42032L,43404L,
52888L,51064L,58812L,57449L,54475L,56395L,64072L,69943L,
73429L ,79232L,78275L,87945L,96497L,92172L,100400L,99713L,
99793L,103067L,115865L,133784L,152043L,147386L,156233L,
170626L,192205L,194640L,230680L,219910L,237391L,233268L ,
243923L,283644L,322543L,327499L,325497L,348052L,425189L,
419233L,446002L,468498L,437879L,543711L,560730L,57455 9L,
523669L,497116L,490460L,503286L,628410L,567514L,623222L,
632132L,609353L,566556L,613224L,639265L,630462L,650250L,
696966L,758969L,799461L,719222L, 735193L,740941L,703823L,
683390L,781972L,807650L,838559L,829927L,961855L,1204939L,
1082964L,1098516L,1494934L,1009347L,1020310L,1048679L,1294614L,
1343828L,1387719L, 1314019L,1585696L,1351193L,1556725L,2798107L,
1376827L,1343441L,1290658L,1328986L,1429274L,1803343L,1204529L,
1201884L,1192114L,1366015L,1568402L,1429326L,1254460L),
评论= C(0L,0L,0L,0L,0L,0L,2357L,7953L,9541L,
14321L,19866L,27423L,29983L,37587L,50659L,50773L,54536L,
62362L,60820L,82659L ,97745L,113684L,127091L,170643L,
180439L,207659L,225203L,260123L,274924L,373975L,362979L,
455129L,441245L,464387L,468865L,537406L,579049L,593005L,
597998L ,683651L,789113L,797219L,852556L,1058022L,94 8344L,
1055005L,1099697L,1206715L,1264047L,1477059L,1760218L,
2040509L,2240352L,2226624L,2557647L,2905450L,2686848L,
3243501L,3211545L,3283363L,3548140L,4060855L,4281423L,
4718729L,5049686L,5735450L,5957395L,6668561L,6388389L,
7571304L,7601725L,8896402L,9814580L,10633712L,12423445L,
12222905L,13577570L,13753896L,14542605L,16527084L,16422774L,
17954424L,19216041L,20510389L,21949445L,24387949L,25817623L,
23609848L,24936572L,24834710L,26230630L,30694351L,27416555L,
30977337L,33551836L,33281887L,33022329L,35257639L,35009325L,
32325018L,36210545L,37827440L,40045414L,43017721L,39198081L,
42942717L,42884781L,42886243L,42508122L,47416897L,47541298L,
45680630L,47949180L,46891046L,49234627L,54590153L,48901554L,
55307000L, 55748704L,55148495L,55142182L,59234553L,58899315L,
56227874L,60400360L,5 8276635L,59156435L,62749684L,59854458L,
64461004L,64968014L,65928553L,66531676L,67606088L,70203145L,
67565561L,72550880L,71914026L,73367953L,79851397L,72457238L,
74989033L),提交= c (113L,1075L,2088L,2439L,3508L,
3714L,5330L,8128L,9627L,12683L,12783L,14941L,17079L,
24899L,42277L,55163L,38748L,37220L,36360L,44261L,47415L ,
59045L,62039L,65580L,62900L,73995L,84961L,91521L,101662L,
107142L,110957L,143287L,147732L,169897L,168891L,178929L,
192977L,219036L,213981L,258796L ,284929L,276948L,287571L,
337394L,334391L,370394L,367355L,364984L,392516L,436016L,
445941L,450769L,468877L,464344L,498628L,565217L,518733L,
623178L,634455L ,536295L,499033L,522386L,561752L,620834L,
653032L,699986L,750552L,862205L,837849L,992189L,984104L,
1101438L,1172192L,1281391L,1474301L,1503691L,1627731L,
1666608L,1796186L,2028265L,1996717L,2188966L,2315044L,
2336047L,2430131L,2727478L,2822897L,2645828L,2848964L,
2769537L,2802846L,3224703L,2969247L,3286715L,3458898L,
3334460L, 3290711L,3470590L,3404255L,3342654L,3657559L,
3617673L,3897270L,4311176L,4258096L,4457622L,4256699L,
4327371L,4248739L,4654776L,4760451L,4736550L,5021485L,
4977439L,5156490L, 5705886L,5298054L,5851273L,5819198L,
5979365L,6061807L,6143449L,6390745L,6524258L,6690333L,
6578227L,6762600L,7814491L,8011045L,7427206L,7358231L,
8018299L,7952227L,8157043L, 8430184L,7943082L,8657116L,
9036437L,9275209L,10079594L,9141514L,8320634L),votes_cast = C(1593,
7697,21001,25623,38336,53578,140677,251891,281917,
354070,412558,527969,508352,670992,916705,872289,969661
1080387,1000432,1372822,1418432,1585620,1870638,2331648
2298172,2651797,2712152,3180503,3140253,3496048,3966451,
4925835,4929946,4915463,4153792,4755783,5567076,6043979,
6311657,7227888,8008763,7723053,7969214,9919486,8544935,
9172783,9684676,10097245,11040009,12708002,14921321,
15477325,17129919,16854507,21118879,22799456,21307718,
23955640,24015058,24352578,26711537,29005400,31540253,
36783663,38717930,42922895,44721742,51762788,49547623,
60411718,61635008,76643286,85136762,91292574,110235621,
111005564,125330096,131946776,146746427,170252197,170174242,
192702118,2133439714,227738040,242492335,270949434,291082814,
276403018,299625008,303961085,323300156,367665686,36187498,
386367195,418442929,4117627992,405759094,420771491,414721909,
389736074, 412008384,422974888,452019068,477554760,433357873,
476138296,469425693,469225454,457406295,489737 473,499537753,
481776130,506470420,507657165,528570710,572878135,540936548,
613690994,618378213,622298648,673896944.5,716120978.6,
745813321.7,788014837,828691834,842793081,834890351,
914619383,803209155,825434703,888020408,936598904,998290062,
863629375,990641834,842687530,1118434460,1243171165,
1266718016,1362587431,1296037003,1290797207),date = structure(c(12935,
12965,12996,13027,13057,13088,13118,13149,13180,13208,
13239,13269,13300,13330,13361,13392,13422,13453,13483,
13514,13545 ,13573,13604,13634,13665,13695,13726,13757,
13787,13818,13848,13879,13910,13939,13970,14000,14031,
14061,14092,14123,14153,14184 ,14214,14245,14276,14304,
14335,14365,14396,14426,14457,14488,14518,14549,14579,
14610,14641,14669,14700,14730,14761,14791,14822 ,14853,
14883,14914,14944,14 975,15006,15034,15065,15095,15126,
15156,15187,15218,15248,15279,15309,15340,15371,15400,
15431,15461,15492,15522,15553,15584, 15614,15645,15675,
15706,15737,15765,15796,15826,15857,15887,15918,15949,
15979,16010,16040,16071,16102,16130,16161,16191,16222,
16252,16283,16314,16344,16375,16405,16436,16467,16495
16526,16556,16587,16617,16648,16679,16709,16740,16770
16801, 16832,16861,16892,16922,16953,16983,17014,17045,
17075,17106,17136,17167,17198,17226),class =Date,tzone =America / New_York)),行.names = c(NA,
-142L),.Names = c(month,accounts_created,comments,submission,
votes_cast,date),class =data.frame)

显然服务器端并没有完全充实,但我无法获得当我检查第一个复选框时出现图。控制台中没有错误。不知道我在做什么错误....

解决方案

下面的代码工作。我已经消除了 renderPlot 函数中的冗余反应(它本身就是一个急需的反应,可以比较观察 )。
我对使用 grepl 不是很确定,所以在这段代码的上下文中,我只用 if

在这个答案中查看我的代码,找到一组复杂的组件来解决与 checkboxGroupInput 不同的行为: checkBoxGroupInput和if语句(包含数据)



示例代码接近我评论的结尾。

  library(shiny)
library(ggplot2)
library(anytime)
library(dplyr)
$ b x x <-read.csv(accounts_created_by_month.csv,header = T,stringsAsFactors = F)
x [date]< -anydate(x $ month)

ui< - fluidPage(

#应用程序标题
title =Reddit Data By Month,

plotOutput(graph),

hr(),

fluidRow(
column(6,
dateRangeInput(日期,标签= h2(日期范围), start = x $ date [1],end = x $ date [142],min = x $ date [1],max = x $ date [142],format =mm / yyyy,startview =year)
$ b $
列$ 6 $ $ $ $ checkboxGroupInput(checkGroup,label = h2(Data Sets),
choices = list(Accounts Created = 1,评论= 2,提交= 3,投票= 4),
选择= NULL)
#NULL




server = function(input,output,session){

subsetData< - reactive({
newData< - subset(x,date> as.Date(输入$ dates [1])& as.Date(日期)< as.Date(输入$ dates [2]))
return(newData)
})

输出$ graph< - renderPlot({
if(length (input $ checkGroup == 0)return()
graph< - ggplot()
if(input $ checkGroup == 1){
graph + geom_line(data = subsetData() ,aes(x = date,y = accounts_created,color =red))
}
})
}

shinyApp(ui,server)


I have the following ui.R

library(shiny)
library(anytime)

x<-read.csv("reddit_data_by_month.csv",header=T)
x["date"]<-anydate(x$month)

shinyUI(fluidPage(

  # Application title
  title ="Reddit Data By Month",

  plotOutput("graph"),

  hr(),

  fluidRow(    
    column(6, 
      dateRangeInput("dates", label = h2("Date Range"), start = x$date[1], end = x$date[142], min = x$date[1], max = x$date[142], format = "mm/yyyy", startview = "year")

    ),
    column(6,
      checkboxGroupInput("checkGroup", label = h2("Data Sets"), 
                         choices = list("Accounts Created" = 1, "Comments" = 2, "Submissions" = 3, "Votes" = 4),
                         selected = NULL)
                                   #NULL
    )
  )
)
)

And the following server.R

library(shiny)
library(ggplot2)
library(anytime)
library(dplyr)

x<-read.csv("reddit_data_by_month.csv",header=T)
x["date"]<-anydate(x$month)

shinyServer(function(input, output) {

  subsetData <- reactive({
    newData <- subset(x, date > as.Date(input$dates[1]) & as.Date(date) < as.Date(input$dates[2]))
    return(newData)
  })


  output$graph <- renderPlot({

    reactive({
    graph <- ggplot()

    if (grepl("1",input$checkGroup)){
      graph+geom_line(data=subsetData(),aes(x=date,y=accounts_created,color="red"))
    }      
    })

  })

})

My data is

structure(list(month = structure(1:142, .Label = c("2005-06", 
"2005-07", "2005-08", "2005-09", "2005-10", "2005-11", "2005-12", 
"2006-01", "2006-02", "2006-03", "2006-04", "2006-05", "2006-06", 
"2006-07", "2006-08", "2006-09", "2006-10", "2006-11", "2006-12", 
"2007-01", "2007-02", "2007-03", "2007-04", "2007-05", "2007-06", 
"2007-07", "2007-08", "2007-09", "2007-10", "2007-11", "2007-12", 
"2008-01", "2008-02", "2008-03", "2008-04", "2008-05", "2008-06", 
"2008-07", "2008-08", "2008-09", "2008-10", "2008-11", "2008-12", 
"2009-01", "2009-02", "2009-03", "2009-04", "2009-05", "2009-06", 
"2009-07", "2009-08", "2009-09", "2009-10", "2009-11", "2009-12", 
"2010-01", "2010-02", "2010-03", "2010-04", "2010-05", "2010-06", 
"2010-07", "2010-08", "2010-09", "2010-10", "2010-11", "2010-12", 
"2011-01", "2011-02", "2011-03", "2011-04", "2011-05", "2011-06", 
"2011-07", "2011-08", "2011-09", "2011-10", "2011-11", "2011-12", 
"2012-01", "2012-02", "2012-03", "2012-04", "2012-05", "2012-06", 
"2012-07", "2012-08", "2012-09", "2012-10", "2012-11", "2012-12", 
"2013-01", "2013-02", "2013-03", "2013-04", "2013-05", "2013-06", 
"2013-07", "2013-08", "2013-09", "2013-10", "2013-11", "2013-12", 
"2014-01", "2014-02", "2014-03", "2014-04", "2014-05", "2014-06", 
"2014-07", "2014-08", "2014-09", "2014-10", "2014-11", "2014-12", 
"2015-01", "2015-02", "2015-03", "2015-04", "2015-05", "2015-06", 
"2015-07", "2015-08", "2015-09", "2015-10", "2015-11", "2015-12", 
"2016-01", "2016-02", "2016-03", "2016-04", "2016-05", "2016-06", 
"2016-07", "2016-08", "2016-09", "2016-10", "2016-11", "2016-12", 
"2017-01", "2017-02", "2017-03"), class = "factor"), accounts_created = c(48L, 
218L, 661L, 523L, 587L, 1385L, 3175L, 3694L, 4828L, 6907L, 6100L, 
7331L, 9847L, 9182L, 13517L, 14172L, 15607L, 20457L, 13691L, 
35775L, 23302L, 25936L, 29160L, 44229L, 28057L, 31420L, 35582L, 
35225L, 62448L, 28496L, 27419L, 33332L, 30771L, 33643L, 31474L, 
37465L, 40301L, 41403L, 38573L, 43099L, 44447L, 42032L, 43404L, 
52888L, 51064L, 58812L, 57449L, 54475L, 56395L, 64072L, 69943L, 
73429L, 79232L, 78275L, 87945L, 96497L, 92172L, 100400L, 99713L, 
99793L, 103067L, 115865L, 133784L, 152043L, 147386L, 156233L, 
170626L, 192205L, 194640L, 230680L, 219910L, 237391L, 233268L, 
243923L, 283644L, 322543L, 327499L, 325497L, 348052L, 425189L, 
419233L, 446002L, 468498L, 437879L, 543711L, 560730L, 574559L, 
523669L, 497116L, 490460L, 503286L, 628410L, 567514L, 623222L, 
632132L, 609353L, 566556L, 613224L, 639265L, 630462L, 650250L, 
696966L, 758969L, 799461L, 719222L, 735193L, 740941L, 703823L, 
683390L, 781972L, 807650L, 838559L, 829927L, 961855L, 1204939L, 
1082964L, 1098516L, 1494934L, 1009347L, 1020310L, 1048679L, 1294614L, 
1343828L, 1387719L, 1314019L, 1585696L, 1351193L, 1556725L, 2798107L, 
1376827L, 1343441L, 1290658L, 1328986L, 1429274L, 1803343L, 1204529L, 
1201884L, 1192114L, 1366015L, 1568402L, 1429326L, 1254460L), 
    comments = c(0L, 0L, 0L, 0L, 0L, 0L, 2357L, 7953L, 9541L, 
    14321L, 19866L, 27423L, 29983L, 37587L, 50659L, 50773L, 54536L, 
    62362L, 60820L, 82659L, 97745L, 113684L, 127091L, 170643L, 
    180439L, 207659L, 225203L, 260123L, 274924L, 373975L, 362979L, 
    455129L, 441245L, 464387L, 468865L, 537406L, 579049L, 593005L, 
    597998L, 683651L, 789113L, 797219L, 852556L, 1058022L, 948344L, 
    1055005L, 1099697L, 1206715L, 1264047L, 1477059L, 1760218L, 
    2040509L, 2240352L, 2226624L, 2557647L, 2905450L, 2686848L, 
    3243501L, 3211545L, 3283363L, 3548140L, 4060855L, 4281423L, 
    4718729L, 5049686L, 5735450L, 5957395L, 6668561L, 6388389L, 
    7571304L, 7601725L, 8896402L, 9814580L, 10633712L, 12423445L, 
    12222905L, 13577570L, 13753896L, 14542605L, 16527084L, 16422774L, 
    17954424L, 19216041L, 20510389L, 21949445L, 24387949L, 25817623L, 
    23609848L, 24936572L, 24834710L, 26230630L, 30694351L, 27416555L, 
    30977337L, 33551836L, 33281887L, 33022329L, 35257639L, 35009325L, 
    32325018L, 36210545L, 37827440L, 40045414L, 43017721L, 39198081L, 
    42942717L, 42884781L, 42886243L, 42508122L, 47416897L, 47541298L, 
    45680630L, 47949180L, 46891046L, 49234627L, 54590153L, 48901554L, 
    55307000L, 55748704L, 55148495L, 55142182L, 59234553L, 58899315L, 
    56227874L, 60400360L, 58276635L, 59156435L, 62749684L, 59854458L, 
    64461004L, 64968014L, 65928553L, 66531676L, 67606088L, 70203145L, 
    67565561L, 72550880L, 71914026L, 73367953L, 79851397L, 72457238L, 
    74989033L), submissions = c(113L, 1075L, 2088L, 2439L, 3508L, 
    3714L, 5330L, 8128L, 9627L, 12683L, 12783L, 14941L, 17079L, 
    24899L, 42277L, 55163L, 38748L, 37220L, 36360L, 44261L, 47415L, 
    59045L, 62039L, 65580L, 62900L, 73995L, 84961L, 91521L, 101662L, 
    107142L, 110957L, 143287L, 147732L, 169897L, 168891L, 178929L, 
    192977L, 219036L, 213981L, 258796L, 284929L, 276948L, 287571L, 
    337394L, 334391L, 370394L, 367355L, 364984L, 392516L, 436016L, 
    445941L, 450769L, 468877L, 464344L, 498628L, 565217L, 518733L, 
    623178L, 634455L, 536295L, 499033L, 522386L, 561752L, 620834L, 
    653032L, 699986L, 750552L, 862205L, 837849L, 992189L, 984104L, 
    1101438L, 1172192L, 1281391L, 1474301L, 1503691L, 1627731L, 
    1666608L, 1796186L, 2028265L, 1996717L, 2188966L, 2315044L, 
    2336047L, 2430131L, 2727478L, 2822897L, 2645828L, 2848964L, 
    2769537L, 2802846L, 3224703L, 2969247L, 3286715L, 3458898L, 
    3334460L, 3290711L, 3470590L, 3404255L, 3342654L, 3657559L, 
    3617673L, 3897270L, 4311176L, 4258096L, 4457622L, 4256699L, 
    4327371L, 4248739L, 4654776L, 4760451L, 4736550L, 5021485L, 
    4977439L, 5156490L, 5705886L, 5298054L, 5851273L, 5819198L, 
    5979365L, 6061807L, 6143449L, 6390745L, 6524258L, 6690333L, 
    6578227L, 6762600L, 7814491L, 8011045L, 7427206L, 7358231L, 
    8018299L, 7952227L, 8157043L, 8430184L, 7943082L, 8657116L, 
    9036437L, 9275209L, 10079594L, 9141514L, 8320634L), votes_cast = c(1593, 
    7697, 21001, 25623, 38336, 53578, 140677, 251891, 281917, 
    354070, 412558, 527969, 508352, 670992, 916705, 872289, 969661, 
    1080387, 1000432, 1372822, 1418432, 1585620, 1870638, 2331648, 
    2298172, 2651797, 2712152, 3180503, 3140253, 3496048, 3966451, 
    4925835, 4929946, 4915463, 4153792, 4755783, 5567076, 6043979, 
    6311657, 7227888, 8008763, 7723053, 7969214, 9919486, 8544935, 
    9172783, 9684676, 10097245, 11040009, 12708002, 14921321, 
    15477325, 17129919, 16854507, 21118879, 22799456, 21307718, 
    23955640, 24015058, 24352578, 26711537, 29005400, 31540253, 
    36783663, 38717930, 42922895, 44721742, 51762788, 49547623, 
    60411718, 61635008, 76643286, 85136762, 91292574, 110235621, 
    111005564, 125330096, 131946776, 146746427, 170252197, 170174242, 
    192702118, 213439714, 227738040, 242492335, 270949434, 291082814, 
    276403018, 299625008, 303961085, 323300156, 367665686, 336187498, 
    386367195, 418442929, 417627992, 405759094, 420771491, 414721909, 
    389736074, 412008384, 422974888, 452019068, 477554760, 433357873, 
    476138296, 469425693, 469225454, 457406295, 489737473, 499537753, 
    481776130, 506470420, 507657165, 528570710, 572878135, 540936548, 
    613690994, 618378213, 622298648, 673896944.5, 716120978.6, 
    745813321.7, 788014837, 828691834, 842793081, 834890351, 
    914619383, 803209155, 825434703, 888020408, 936598904, 998290062, 
    863629375, 990641834, 842687530, 1118434460, 1243171165, 
    1266718016, 1362587431, 1296037003, 1290797207), date = structure(c(12935, 
    12965, 12996, 13027, 13057, 13088, 13118, 13149, 13180, 13208, 
    13239, 13269, 13300, 13330, 13361, 13392, 13422, 13453, 13483, 
    13514, 13545, 13573, 13604, 13634, 13665, 13695, 13726, 13757, 
    13787, 13818, 13848, 13879, 13910, 13939, 13970, 14000, 14031, 
    14061, 14092, 14123, 14153, 14184, 14214, 14245, 14276, 14304, 
    14335, 14365, 14396, 14426, 14457, 14488, 14518, 14549, 14579, 
    14610, 14641, 14669, 14700, 14730, 14761, 14791, 14822, 14853, 
    14883, 14914, 14944, 14975, 15006, 15034, 15065, 15095, 15126, 
    15156, 15187, 15218, 15248, 15279, 15309, 15340, 15371, 15400, 
    15431, 15461, 15492, 15522, 15553, 15584, 15614, 15645, 15675, 
    15706, 15737, 15765, 15796, 15826, 15857, 15887, 15918, 15949, 
    15979, 16010, 16040, 16071, 16102, 16130, 16161, 16191, 16222, 
    16252, 16283, 16314, 16344, 16375, 16405, 16436, 16467, 16495, 
    16526, 16556, 16587, 16617, 16648, 16679, 16709, 16740, 16770, 
    16801, 16832, 16861, 16892, 16922, 16953, 16983, 17014, 17045, 
    17075, 17106, 17136, 17167, 17198, 17226), class = "Date", tzone = "America/New_York")), row.names = c(NA, 
-142L), .Names = c("month", "accounts_created", "comments", "submissions", 
"votes_cast", "date"), class = "data.frame")

Obviously the server side is not fully fleshed out, but I cannot get the plot to appear when I check the first checkbox. There are no errors in the console. Not sure what I'm doing wrong....

解决方案

The code below works. I've just eliminated the redundant reactive within the renderPlot function (which in itself is an eager reactive, comparable to observe). I am not terribly sure about using grepl, so in the context of this code I've just used if.

See my code in this answer for a complex set of components to address different behaviours with checkboxGroupInput: checkBoxGroupInput and if statements (data included)

The example code is near the end of my comment.

library(shiny)
library(ggplot2)
library(anytime)
library(dplyr)

x<-read.csv("accounts_created_by_month.csv",header=T, stringsAsFactors = F)
x["date"]<-anydate(x$month)

ui <- fluidPage(

  # Application title
  title ="Reddit Data By Month",

  plotOutput("graph"),

  hr(),

  fluidRow(    
    column(6, 
           dateRangeInput("dates", label = h2("Date Range"), start = x$date[1], end = x$date[142], min = x$date[1], max = x$date[142], format = "mm/yyyy", startview = "year")

    ),
    column(6,
    checkboxGroupInput("checkGroup", label = h2("Data Sets"), 
                             choices = list("Accounts Created" = 1, "Comments" = 2, "Submissions" = 3, "Votes" = 4),
                             selected = NULL)
           #NULL
    )
  )
)

server = function(input, output,session) {

subsetData <- reactive({
    newData <- subset(x, date > as.Date(input$dates[1]) & as.Date(date) < as.Date(input$dates[2]))
    return(newData)
  })

  output$graph <- renderPlot({
    if(length(input$checkGroup) == 0) return()
      graph <- ggplot()
      if (input$checkGroup == 1){
        graph+geom_line(data=subsetData(),aes(x=date,y=accounts_created,color="red"))
      }      
    })
}

shinyApp(ui,server)

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