无错误地停止 R 程序 [英] Stop an R program without error

问题描述

有什么办法可以不出错地停止 R 程序吗?

Is there any way to stop an R program without error?

例如，我有一个很大的源，定义了几个函数，然后有一些对函数的调用.碰巧我编辑了一些函数，并希望在 R 环境中更新函数定义，但实际上并没有调用它们.

For example I have a big source, defining several functions and after it there are some calls to the functions. It happens that I edit some function, and want the function definitions to be updated in R environment, but they are not actually called.

我定义了一个变量 justUpdate 并且当它是 TRUE 想在函数定义后立即停止程序.

I defined a variable justUpdate and when it is TRUE want to stop the program just after function definitions.

ReadInput <- function(...) ...
Analyze <- function(...) ...
WriteOutput <- function(...) ...

if (justUpdate)
    stop()
# main body
x <- ReadInput()
y <- Analyze(x)
WriteOutput(y)

我已经调用了 stop() 函数，但问题是它打印了一条错误消息.

I have called stop() function, but the problem is that it prints an error message.

ctrl+c 是另一种选择，但我想在特定行中停止源.

ctrl+c is another option, but I want to stop the source in specific line.

q() 或 quit() 的问题在于它终止了 R 会话，但我希望 R 会话仍然打开.

The problem with q() or quit() is that it terminates R session, but I would like to have the R session still open.

正如@JoshuaUlrich 建议的 browser() 可以是另一种选择，但仍然不完美，因为源在新环境中终止(即 R 提示将更改为 Browser[1]> 而不是 >).我们仍然可以按 Q 退出它，但我正在寻找直接的方法.

As @JoshuaUlrich proposed browser() can be another option, but still not perfect, because the source terminates in a new environment (i.e. the R prompt will change to Browser[1]> rather than >). Still we can press Q to quit it, but I am looking for the straightforward way.

另一种选择是使用 if (!justUpdate) { main body } 但它是在清除问题，而不是解决问题.

Another option is to use if (! justUpdate) { main body } but it's clearing the problem, not solving it.

还有更好的选择吗?

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