中断/退出脚本 [英] break/exit script

问题描述

我有一个程序，该程序进行一些数据分析，并且有几百行.

I have a program that does some data analysis and is a few hundred lines long.

在程序的早期，我想进行一些质量控制，如果没有足够的数据，我希望程序终止并返回到R控制台.否则，我希望其余代码执行.

Very early on in the program, I want to do some quality control and if there is not enough data, I want the program to terminate and return to the R console. Otherwise, I want the rest of the code to execute.

我尝试了 break ， browser 和 quit ，但它们都没有阻止程序其余部分的执行(并且 quit 会停止执行并完全退出R，这是我不希望发生的事情.我的最后一招是创建一个 if-else 语句，如下所示:

I've tried break,browser, and quit and none of them stop the execution of the rest of the program (and quit stops the execution as well as completely quitting R, which is not something I want to happen). My last resort is creating an if-else statement as below:

 if(n < 500){}
 else{*insert rest of program here*}

但这似乎是不好的编码习惯.我想念什么吗?

but that seems like bad coding practice. Am I missing something?

推荐答案

如果希望程序产生错误，则可以使用 stopifnot()函数:

You could use the stopifnot() function if you want the program to produce an error:

foo <- function(x) {
    stopifnot(x > 500)
    # rest of program
}

这篇关于中断/退出脚本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！