How to extract time interval data from minute data in r
我正在尝试从1分钟数据中以5分钟间隔提取行。我的数据如下所示：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | structure(list(Date = structure(c(1509408000, 1509408000, 1509408000, 1509408000, 1509408000, 1509408000), class = c("POSIXct","POSIXt" ), tzone ="UTC"), Time = structure(c(-2209021500, -2209021560, -2209021620, -2209021680, -2209021740, -2209021800), class = c("POSIXct", "POSIXt"), tzone ="UTC"), O = c(3674, 3675, 3674, 3675, 3675, 3675), H = c(3674, 3675, 3675, 3676, 3676, 3675), L = c(3673, 3674, 3674, 3674, 3675, 3675), C = c(3673, 3674, 3674, 3675, 3675, 3675)), row.names = c(NA, -6L), class = c("tbl_df","tbl", "data.frame")) structure(list(Date = structure(c(1506902400, 1506902400, 1506902400, 1506902400, 1506902400, 1506902400), class = c("POSIXct","POSIXt" ), tzone ="UTC"), Time = structure(c(-2209071300, -2209071360, -2209071420, -2209071480, -2209071540, -2209071600), class = c("POSIXct", "POSIXt"), tzone ="UTC"), O = c(3450, 3451, 3451, 3452, 3450, 3449), H = c(3451, 3451, 3451, 3452, 3452, 3451), L = c(3448, 3449, 3449, 3450, 3450, 3449), C = c(3448, 3451, 3450, 3451, 3452, 3450)), row.names = c(NA, -6L), class = c("tbl_df","tbl", "data.frame")) |
我看过：
从R中的分钟数据创建15分钟的时间间隔？
如何按行中的时间间隔对时间序列进行子集和提取
但没有一个完全符合我的要求。也许我可以用这个：
但我不确定如何将其与
所需的输出：以30分钟的间隔查找行：
您可以使用
提取带有分钟标记的行，该行以0或5结尾。
1 2 3 4 5 | df[substr(format(df$Time, '%M'), 2, 2) %in% c(0, 5),] # or df[as.numeric(format(df$Time, '%M')) %% 5 == 0,] # or df[grep('[0|5]$', format(df$Time, '%M')),] |
使用
1 2 3 4 5 6 7 8 | library(dplyr) df %>% filter(substr(format(df$Time, '%M'), 2, 2) %in% c(0, 5)) # or df %>% filter(as.numeric(format(df$Time, '%M')) %% 5 == 0) |