结果长度必须为非零吗？ [英] Result must have non-zero length?

问题描述

我被要求为一家公司的实习生做编码项目，但我无法完成。但是我没有得到我想要完成的工作。出现的错误是：

I was asked to do the coding project for a job as an intern in a company but I wasnt able to complete it. However I didn't get the job I wanted to just complete the thing . The error that arrives is:

错误：结果的长度必须为12813，而不是0

Error :Result must have length 12813, not 0

这是我的代码：

library(shiny)
library(dplyr)
stock<-read.csv("thafinal2.0.csv")

ui <- fluidPage(
dateInput(inputId = 'date1',label = 'Start',value = "2017-08-20"),
dateInput(inputId = 'date2',label = 'Stop',value = "2018-08-20"),
tabPanel("stock", DT::dataTableOutput("table")))
server <- function(input, output) {
output$table<-DT::renderDataTable({
stock %>%
filter(stock$date >= "2018-01-05" & stock$date <= "2018-01-03")
stock })}

shinyApp(ui, server)

我要选择范围为

推荐答案

回答戴森。
问题出在代码中：

Answer goes out to Dason. The problem is in code:

filter(stock$date >= "2018-01-05" & stock$date <= "2018-01-03")

您同时过滤的日期晚于 2018-01-05和早于 2018-01-03的这种操作会导致长度为0的空集。

You filter simultanously dates later than "2018-01-05" and earlier than "2018-01-03" this kind of operation results to empty set with length 0.

如果更改为：

filter(stock$date <= "2018-01-05" & stock$date >= "2018-01-03")

应该可以。

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