从 R 中的第一次击键开始的时间用户输入 [英] Time user input from first keystroke in R

问题描述

计算用户从第一次击键开始用 R 键入消息所需的时间.

Looking to time how long it takes a user to type a message in R from the first keystroke.

我可以使用 readline() 或 scan() 之类的函数来获取用户输入，我可以使用 system.time()code> 来衡量代码运行需要多长时间:

I can use functions like readline() or scan() to get the user input, and I can use the system.time() to measure how long it takes for the code to be run:

> system.time(readline())
Test Message
   user  system elapsed 
   0.98    0.53   19.55

但是，这些给了我总经过时间.如果我在输入前等待 15 秒，这将反映在 system.time() 的输出中，而不仅仅是我编写消息所花费的时间.(例如 19.55s = 15s + ~4.5s 我曾经输入消息.)

However, these give me the total elapsed time. If I wait wait 15 seconds before typing, this is reflected in the output of system.time(), and not just the time I spent to write the message. (E.g 19.55s = 15s + ~4.5s I used to type the message.)

希望在控制台中发生这种情况，但也愿意在必要时使用单独的窗口.

Looking for this to happen in the console, but also willing to use a separate window if necessary.

推荐答案

我最近使用两个包 - tictoc 和 keypress 的组合解决了这个问题.

I recently solved this issue using a combination of two packages - tictoc and keypress.

从 keypress 您可以使用 keypress() 函数等待用户输入然后输出按下的键 - keypress() 仅在命令行中适用于 R 并且它支持大多数键，但不是全部.

From keypress you can use the keypress() function that waits for user input and then outputs the key that was pressed - keypress() only works in R on command line and it supports the majority of keys, but not all of them.

从按键开始计时，您可以编写一个简单的 if 语句，从 tictoc 调用 tic() 函数.

To time from a keypress you can write a simple if statement that calls the tic() function from tictoc.

示例

当我发布这个问题时，我想计算一个人在按下a"键后输入整个小写字母需要多长时间.

When I posted this question I was looking to time how long it would take someone to type the entire lowercase alphabet after hitting the 'a' key.

require(tictoc)
require(keypress)

for(i in 1:26){

  a=keypress()

  if(a==letters[1])  tic()
  if(a==letters[26]) toc()

  cat(paste(a))
}

abcdefghijklmnopqrstuvwxyz6.649 sec elapsed

当按下 'a' 时启动秒表，然后在按下 'z' 键时停止.

This starts the stopwatch when 'a' is hit, and then stops it when the 'z' key is pressed.

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