R 基于同一行不同列中的值标识一列中的值

我有一些数据是从驾驶模拟中获取的，我们试图测量制动反应时间。使用下面的示例数据作为上下文，我感兴趣的列是时间、制动（范围0-1；表示施加到制动踏板上的力）和沿道路的距离。在驾驶场景中，受试者沿着笔直的道路行驶，在460米（沿道路的距离值）处，活动开始。感兴趣的第一个值是时间列中表示此事件开始时间的对应值。我们要确定的第二个值是制动值超过0.2的时间。这两点之间的差异（使用时间列中的值）将为我们提供一个反应时间

我对使用R非常陌生，到目前为止，我已经能够使用代码

Log$V1[Log$V5==460]

识别出感兴趣的第一个值。但是，这并没有很大帮助，因为“沿道路的距离”列中的值通常不是整数，并且会有几个小数位。所以我真的想确定460和461之间的距离

如果有人能给我指出正确的方向，那就太好了，因为我被卡住了

谢谢

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我们可以使用

cut

函数创建“bin”来“离散化”连续变量：

cut(cars$dist, breaks = seq(1, 100, 20))

返回：

[1]（1,11]（1,11）（1,11）（21,31）（11,21）（1,11）（11,21）（21,31）（31,41）（11,21）（21,31]
[12] (11,21] (11,21] (21,31] (21,31] (21,31] (31,41] (31,41] (41,51] (21,31] (31,41] (51,61]
[23] (71,81] (11,21] (21,31] (51,61] (31,41] (31,41] (31,41] (31,41] (41,51] (41,51] (51,61]
[34] (71,81] (81,91] (31,41] (41,51] (61,71] (31,41] (41,51] (51,61] (51,61] (61,71] (61,71]
[45] (51,61] (61,71]             (81,91]
级别：（1,11]（11,21）（21,31）（31,41）（41,51）（51,61）（61,71）（71,81）（81,91）

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另外：如果你发布了一个而不是一个数据图像，那么给你一个好的答案会更容易。这是获得好答案的另一个极好的信息来源。

你的第一行实际上是变量名，因此你首先需要回顾你是如何导入数据的。请使用

dput

添加数据并显示预期的输出同样的，请阅读有关的信息以及如何给出建议。

 [1] (1,11]  (1,11]  (1,11]  (21,31] (11,21] (1,11]  (11,21] (21,31] (31,41] (11,21] (21,31]
[12] (11,21] (11,21] (21,31] (21,31] (21,31] (31,41] (31,41] (41,51] (21,31] (31,41] (51,61]
[23] (71,81] (11,21] (21,31] (51,61] (31,41] (31,41] (31,41] (31,41] (41,51] (41,51] (51,61]
[34] (71,81] (81,91] (31,41] (41,51] (61,71] (31,41] (41,51] (51,61] (51,61] (61,71] (61,71]
[45] (51,61] (61,71] <NA>    <NA>    <NA>    (81,91]
Levels: (1,11] (11,21] (21,31] (31,41] (41,51] (51,61] (61,71] (71,81] (81,91]