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r - 用条件改变所有数值变量

问题描述

我有以下数据集。

 structure(list(Monate = structure(c(5L, 4L, 9L, 1L, 8L, 7L, 6L, 
    2L, 12L, 11L, 10L, 3L), .Label = c("April", "August", "Dezember", 
    "Februar", "Januar", "Juli", "Juni", "Mai", "März", "November", 
    "Oktober", "September"), class = "factor"), `06:00:00-00:59:59` = c(1.23650890285152, 
    1, 0.941959539059369, 0.89618038635695, 0.839845976370379, 0.75789368475892, 
    0.745357979199247, 0.72726835342115, 0.852384444043199, 0.909567524854388, 
    0.927385464132519, 0.86987613403725), `06:00:00-08:59:59` = c(0.28594460357425, 
    0.28900629033325, 0.315719841587, 0.2955345904455, 0.273041491484, 
    0.26127195229025, 0.23431503049, 0.22167349349575, 0.2603577651915, 
    0.27084189072775, 0.2653932948955, 0.246001500902), `09:00:00-12:59:59` = c(0.48396300341875, 
    0.4767075864935, 0.46442852744125, 0.4497871047545, 0.4088477917855, 
    0.39907331646225, 0.387052062652, 0.3717692228805, 0.39248244105925, 
    0.422900151297, 0.4111808332435, 0.41687239709375), `13:00:00-16:59:59` = c(0.80304931519625, 
    0.7588016605465, 0.66548492801425, 0.6354014724685, 0.670969199053, 
    0.58076568424625, 0.67418744877975, 0.5756792489565, 0.66766765226025, 
    0.642654220031, 0.665735145053, 0.64571729495575), `17:00:00-19:59:59` = c(1.44101730420325, 
    1.35385679874675, 1.2576760885645, 1.1478274405785, 1.04871946565175, 
    0.96498516399125, 0.9775891903885, 0.9959819200865, 1.0805495717725, 
    1.2042836233065, 1.29337213775425, 1.17905118172475), `20:00:00-22:59:59` = c(2.7590124723295, 
    2.1458514208575, 2.00826846019375, 1.91719758837025, 1.7425652515095, 
    1.509920737758, 1.3851778869395, 1.43588733645025, 1.8753361739725, 
    2.03981388252275, 2.013661241837, 1.79544669375925), `23:00:00-00:59:59` = c(1.92548355216275, 
    0.926693335582, 0.921407232611, 0.92680356666725, 0.87033626954225, 
    0.81832375651025, 0.75033232500425, 0.7289554638715, 0.79565322269175, 
    0.85606802035675, 0.90891474021375, 0.94322847859325)), class = "data.frame", row.names = c(NA, 
    -12L))

我想建立将一个月设置为“1”的索引值。

saisonindex <- RWavg %>%
    mutate(`06:00:00-00:59:59` = `06:00:00-00:59:59` / `06:00:00-00:59:59`[Monate == "Februar"])
saisonindex

      Monate 06:00:00-00:59:59 06:00:00-08:59:59 09:00:00-12:59:59 13:00:00-16:59:59 17:00:00-19:59:59 20:00:00-22:59:59 23:00:00-00:59:59
1     Januar         1.2365089         0.2859446         0.4839630         0.8030493         1.4410173          2.759012         1.9254836
2    Februar         1.0000000         0.2890063         0.4767076         0.7588017         1.3538568          2.145851         0.9266933
3       März         0.9419595         0.3157198         0.4644285         0.6654849         1.2576761          2.008268         0.9214072
4      April         0.8961804         0.2955346         0.4497871         0.6354015         1.1478274          1.917198         0.9268036
5        Mai         0.8398460         0.2730415         0.4088478         0.6709692         1.0487195          1.742565         0.8703363
6       Juni         0.7578937         0.2612720         0.3990733         0.5807657         0.9649852          1.509921         0.8183238
7       Juli         0.7453580         0.2343150         0.3870521         0.6741874         0.9775892          1.385178         0.7503323
8     August         0.7272684         0.2216735         0.3717692         0.5756792         0.9959819          1.435887         0.7289555
9  September         0.8523844         0.2603578         0.3924824         0.6676677         1.0805496          1.875336         0.7956532
10   Oktober         0.9095675         0.2708419         0.4229002         0.6426542         1.2042836          2.039814         0.8560680
11  November         0.9273855         0.2653933         0.4111808         0.6657351         1.2933721          2.013661         0.9089147
12  Dezember         0.8698761         0.2460015         0.4168724         0.6457173         1.1790512          1.795447         0.9432285

我想动态地为所有数字列执行此操作，我想mutate_if(is.numeric)会执行此操作，但我无法理解括号中的条件如何工作。

你能帮助我吗？

标签： rdplyr

解决方案

使用mutate_if，指定~“Monate”为“Februar”的列值，然后对其进行子集化

library(dplyr)
RWavg %>% 
   mutate_if(is.numeric, ~ ./.[Monate == "Februar"])

在base R中，只需对行进行子集化，获取正确的长度，划分并更新列

RWavg[-1] <- RWavg[-1]/RWavg[RWavg$Monate == 'Februar', -1][col(RWavg[-1])]

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