我有以下df，它位于刻度线上：
aud_tick <- data.frame(stringsAsFactors=FALSE,
aud_time = c("2018-02-25 21:55:38.098", "2018-02-25 21:55:38.398",
"2018-02-25 21:55:41.099",
"2018-02-25 21:55:41.398", "2018-02-25 21:55:41.700",
"2018-02-25 21:55:42.000", "2018-02-25 21:55:57.308",
"2018-02-25 21:55:57.907", "2018-02-25 21:55:57.908",
"2018-02-25 21:56:17.418", "2018-02-25 21:56:17.420",
"2018-02-25 21:56:18.019", "2018-02-25 21:56:21.621",
"2018-02-25 21:56:21.624", "2018-02-25 21:56:47.888",
"2018-02-25 21:56:55.696", "2018-02-25 21:56:59.749",
"2018-02-25 21:56:59.750", "2018-02-25 21:57:00.349",
"2018-02-25 21:57:00.351"),
aud_pair = c("AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD",
"AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD",
"AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD",
"AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD", "AUD/USD",
"AUD/USD"),
aud_bid = c(0.78461, 0.78461, 0.78429, 0.78429, 0.78418, 0.78418, 0.78429,
0.78418, 0.78418, 0.78429, 0.78429, 0.78418,
0.78418, 0.78418, 0.78417, 0.78417, 0.78429, 0.78429,
0.78445, 0.78445),
aud_ask = c(0.78426, 0.78426, 0.78367, 0.78367, 0.78359, 0.78359, 0.78367,
0.78359, 0.78359, 0.78367, 0.78367, 0.78359,
0.78359, 0.78359, 0.7835, 0.7835, 0.78358, 0.78358,
0.78368, 0.78368)
)
我想将数据汇总到一分钟内，在一分钟的窗口内显示这些细节：
或者，任何人都知道如何将时间缩短到：
我完全没有想法，我尝试了几种方法但无济于事。
有任何想法可以帮助我解决这个问题。
提前致谢。
答案 0 :(得分：0)
将数据格式化为适当的格式时，它会舍入到秒。你可以拆分并做任何你想要的聚合（平均值，最大值，最小值......）。
aud_tick$aud_time <- as.POSIXct(aud_tick$aud_time, format = "%Y-%m-%d %H:%M:%S")
split(aud_tick, f = aud_tick$aud_time)
$`2018-02-25 21:55:38`
aud_time aud_pair aud_bid aud_ask
1 2018-02-25 21:55:38 AUD/USD 0.78461 0.78426
2 2018-02-25 21:55:38 AUD/USD 0.78461 0.78426
$`2018-02-25 21:55:41`
aud_time aud_pair aud_bid aud_ask
3 2018-02-25 21:55:41 AUD/USD 0.78429 0.78367
4 2018-02-25 21:55:41 AUD/USD 0.78429 0.78367
5 2018-02-25 21:55:41 AUD/USD 0.78418 0.78359
$`2018-02-25 21:55:42`
aud_time aud_pair aud_bid aud_ask
6 2018-02-25 21:55:42 AUD/USD 0.78418 0.78359
$`2018-02-25 21:55:57`
aud_time aud_pair aud_bid aud_ask
7 2018-02-25 21:55:57 AUD/USD 0.78429 0.78367
8 2018-02-25 21:55:57 AUD/USD 0.78418 0.78359
9 2018-02-25 21:55:57 AUD/USD 0.78418 0.78359
$`2018-02-25 21:56:17`
aud_time aud_pair aud_bid aud_ask
10 2018-02-25 21:56:17 AUD/USD 0.78429 0.78367
11 2018-02-25 21:56:17 AUD/USD 0.78429 0.78367
$`2018-02-25 21:56:18`
aud_time aud_pair aud_bid aud_ask
12 2018-02-25 21:56:18 AUD/USD 0.78418 0.78359
$`2018-02-25 21:56:21`
aud_time aud_pair aud_bid aud_ask
13 2018-02-25 21:56:21 AUD/USD 0.78418 0.78359
14 2018-02-25 21:56:21 AUD/USD 0.78418 0.78359
$`2018-02-25 21:56:47`
aud_time aud_pair aud_bid aud_ask
15 2018-02-25 21:56:47 AUD/USD 0.78417 0.7835
$`2018-02-25 21:56:55`
aud_time aud_pair aud_bid aud_ask
16 2018-02-25 21:56:55 AUD/USD 0.78417 0.7835
$`2018-02-25 21:56:59`
aud_time aud_pair aud_bid aud_ask
17 2018-02-25 21:56:59 AUD/USD 0.78429 0.78358
18 2018-02-25 21:56:59 AUD/USD 0.78429 0.78358
$`2018-02-25 21:57:00`
aud_time aud_pair aud_bid aud_ask
19 2018-02-25 21:57:00 AUD/USD 0.78445 0.78368
20 2018-02-25 21:57:00 AUD/USD 0.78445 0.78368
答案 1 :(得分：0)
我用过：
lubridate::floor_date
有多种选项可用于舍入时间刻度，从秒到一年