Readlines行为已发生变化

时间:2018-06-14 19:52:35

标签: r readline

我多年前制作了一个脚本来跟踪我的财务状况,但它停止了工作。该错误似乎在readLines中。以前,它会接受输入,现在它停留在循环中,而不返回主程序。最小的工作示例如下:

#! /usr/bin/Rscript 
userinput <- function(question) {
  cat(question, "\n> ")
  n <- readLines(con = "stdin", 1)
  return(as.numeric(n))
}

userinput("Enter your age: ") -> age

print(age)

将此脚本另存为userinput.R,然后chmod +x userinput.R,然后./userinput.R。这个例子用于打印年龄,但它等待更多输入。

  • 有什么变化?我该如何解决这个问题?

我的系统:

> sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Manjaro Linux

Matrix products: default
BLAS: /usr/lib/libblas.so.3.8.0
LAPACK: /usr/lib/liblapack.so.3.8.0

locale:
 [1] LC_CTYPE=pt_BR.UTF-8       LC_NUMERIC=C               LC_TIME=pt_BR.UTF-8       
 [4] LC_COLLATE=pt_BR.UTF-8     LC_MONETARY=pt_BR.UTF-8    LC_MESSAGES=pt_BR.UTF-8   
 [7] LC_PAPER=pt_BR.UTF-8       LC_NAME=C                  LC_ADDRESS=C              
[10] LC_TELEPHONE=C             LC_MEASUREMENT=pt_BR.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] compiler_3.5.0 tools_3.5.0    yaml_2.1.19

0 个答案:

没有答案