写完之后，发现之前写过一篇类似的：R语言进阶笔记4 | dplyr 汇总统计。看着重复劳动的产品，无比的感慨，昨日重现？历史重演？
自己的思维模式已经固定？
看似灵机一动的想法，其实都是固定的模式？
以为是一个新的idea，其实想过很多次，不过都忘了！
如果历史能重来，还是如此的选择，人生并不会有什么不同。
死循环，一遍又一遍。
没有新鲜事。
从一篇R语言tidyverse的使用，到感悟人生哲理，再为自己日复一日的原地踏步感到可悲，画地为牢，不敢去挑战新的东西，学习新的领域，坐吃山空，羞愧不已。以此篇为终点，
不要把已经掌握的东西咀嚼很多遍，感慨杯水之波澜，向前，向前！
无以为念，写一篇标题最长的博文作为节点！
正文分割线
之前写过一篇博客，介绍R语言的aggregate函数的汇总统计，最近学习tidyverse，感觉更好用，对比学习一下。
这里模拟了4个因子,5个观测值的数据框, 主要介绍了一下几种方法的汇总统计:
「模拟数据：」
set.seed(123)
dat = data.frame(F1=1:24,F2=rep(1:2,12),F3=rep(1:3,8),F4=rep(1:4,6),
y1=rnorm(24),y2=rnorm(24),y3=rnorm(24),y4=rnorm(24))
dat
「结果:」
> dat
F1 F2 F3 F4 y1 y2 y3 y4
1 1 1 1 1 -0.56047565 -0.62503927 0.77996512 1.005738524
2 2 2 2 2 -0.23017749 -1.68669331 -0.08336907 -0.709200763
3 3 1 3 3 1.55870831 0.83778704 0.25331851 -0.688008616
4 4 2 1 4 0.07050839 0.15337312 -0.02854676 1.025571370
5 5 1 2 1 0.12928774 -1.13813694 -0.04287046 -0.284773007
6 6 2 3 2 1.71506499 1.25381492 1.36860228 -1.220717712
7 7 1 1 3 0.46091621 0.42646422 -0.22577099 0.181303480
8 8 2 2 4 -1.26506123 -0.29507148 1.51647060 -0.138891362
9 9 1 3 1 -0.68685285 0.89512566 -1.54875280 0.005764186
10 10 2 1 2 -0.44566197 0.87813349 0.58461375 0.385280401
11 11 1 2 3 1.22408180 0.82158108 0.12385424 -0.370660032
12 12 2 3 4 0.35981383 0.68864025 0.21594157 0.644376549
13 13 1 1 1 0.40077145 0.55391765 0.37963948 -0.220486562
14 14 2 2 2 0.11068272 -0.06191171 -0.50232345 0.331781964
15 15 1 3 3 -0.55584113 -0.30596266 -0.33320738 1.096839013
16 16 2 1 4 1.78691314 -0.38047100 -1.01857538 0.435181491
17 17 1 2 1 0.49785048 -0.69470698 -1.07179123 -0.325931586
18 18 2 3 2 -1.96661716 -0.20791728 0.30352864 1.148807618
19 19 1 1 3 0.70135590 -1.26539635 0.44820978 0.993503856
20 20 2 2 4 -0.47279141 2.16895597 0.05300423 0.548396960
21 21 1 3 1 -1.06782371 1.20796200 0.92226747 0.238731735
22 22 2 1 2 -0.21797491 -1.12310858 2.05008469 -0.627906076
23 23 1 2 3 -1.02600445 -0.40288484 -0.49103117 1.360652449
24 24 2 3 4 -0.72889123 -0.46665535 -2.30916888 -0.600259587
❝一个统计量, 使用mean
❞
「代码」
aggregate(y1 ~ F4, data=dat,mean)
「结果」
> aggregate(y1 ~ F4, data=dat,mean)
F4 y1
1 1 -0.21454042
2 2 -0.17244730
3 3 0.39386944
4 4 -0.04158475
「代码」
dat %>% group_by(F4) %>% summarise(y1_mean = mean(y1))
「结果」
> dat %>% group_by(F4) %>% summarise(y1_mean = mean(y1))
# A tibble: 4 x 2
F4 y1_mean
* <int> <dbl>
1 1 -0.215
2 2 -0.172
3 3 0.394
4 4 -0.0416
❝多个统计量, 使用length，mean，sd，cv
❞
「代码」
func <- function(x)(c(n = length(x),mean=mean(x,na.rm = T),sd=sd(x,na.rm = T),cv=sd(x,na.rm = T)/mean(x,na.rm = T)*100))
aggregate(y1 ~ F4, data=dat,func) %>% round(4)
「结果」
> func <- function(x)(c(n = length(x),mean=mean(x,na.rm = T),sd=sd(x,na.rm = T),cv=sd(x,na.rm = T)/mean(x,na.rm = T)*100))
> aggregate(y1 ~ F4, data=dat,func) %>% round(4)
F4 y1.n y1.mean y1.sd y1.cv
1 1 6.0000 -0.2145 0.6442 -300.2843
2 2 6.0000 -0.1724 1.1783 -683.2816
3 3 6.0000 0.3939 1.0063 255.4892
4 4 6.0000 -0.0416 1.0651 -2561.3034
「代码」
dat %>% group_by(F4) %>% summarise_at("y1",list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
「结果」
> dat %>% group_by(F4) %>% summarise_at("y1",list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
# A tibble: 4 x 5
F4 n mean sd cv
* <int> <int> <dbl> <dbl> <dbl>
1 1 6 -0.215 0.644 -300.
2 2 6 -0.172 1.18 -683.
3 3 6 0.394 1.01 255.
4 4 6 -0.0416 1.07 -2561.
「注意：」
「代码」
func <- function(x)(c(n = length(x),mean=mean(x,na.rm = T),sd=sd(x,na.rm = T),cv=sd(x,na.rm = T)/mean(x,na.rm = T)*100))
aggregate(y1 ~ F4 + F3, data=dat,func) %>% round(4)
「结果」
> aggregate(y1 ~ F4 + F3, data=dat,func) %>% round(4)
F4 F3 y1.n y1.mean y1.sd y1.cv
1 1 1 2.0000 -0.0799 0.6797 -851.2041
2 2 1 2.0000 -0.3318 0.1610 -48.5202
3 3 1 2.0000 0.5811 0.1700 29.2559
4 4 1 2.0000 0.9287 1.2137 130.6845
5 1 2 2.0000 0.3136 0.2606 83.1119
6 2 2 2.0000 -0.0597 0.2410 -403.4060
7 3 2 2.0000 0.0990 1.5911 1606.4949
8 4 2 2.0000 -0.8689 0.5602 -64.4726
9 1 3 2.0000 -0.8773 0.2694 -30.7050
10 2 3 2.0000 -0.1258 2.6033 -2069.8231
11 3 3 2.0000 0.5014 1.4952 298.1875
12 4 3 2.0000 -0.1845 0.7698 -417.1649
「代码」
dat %>% group_by(F4,F3) %>% summarise_at("y1",list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
「结果」
> dat %>% group_by(F4,F3) %>% summarise_at("y1",list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
# A tibble: 12 x 6
# Groups: F4 [4]
F4 F3 n mean sd cv
<int> <int> <int> <dbl> <dbl> <dbl>
1 1 1 2 -0.0799 0.680 -851.
2 1 2 2 0.314 0.261 83.1
3 1 3 2 -0.877 0.269 -30.7
4 2 1 2 -0.332 0.161 -48.5
5 2 2 2 -0.0597 0.241 -403.
6 2 3 2 -0.126 2.60 -2070.
7 3 1 2 0.581 0.170 29.3
8 3 2 2 0.0990 1.59 1606.
9 3 3 2 0.501 1.50 298.
10 4 1 2 0.929 1.21 131.
11 4 2 2 -0.869 0.560 -64.5
12 4 3 2 -0.185 0.770 -417.
「代码」
aggregate(cbind(y1,y2) ~ F4 + F3, data=dat,func) %>% round(4)
「结果」
> aggregate(cbind(y1,y2) ~ F4 + F3, data=dat,func) %>% round(4)
F4 F3 y1.n y1.mean y1.sd y1.cv y2.n y2.mean y2.sd y2.cv
1 1 1 2.0000 -0.0799 0.6797 -851.2041 2.0000 -0.0356 0.8336 -2344.2900
2 2 1 2.0000 -0.3318 0.1610 -48.5202 2.0000 -0.1225 1.4151 -1155.2944
3 3 1 2.0000 0.5811 0.1700 29.2559 2.0000 -0.4195 1.1963 -285.2021
4 4 1 2.0000 0.9287 1.2137 130.6845 2.0000 -0.1135 0.3775 -332.4424
5 1 2 2.0000 0.3136 0.2606 83.1119 2.0000 -0.9164 0.3136 -34.2148
6 2 2 2.0000 -0.0597 0.2410 -403.4060 2.0000 -0.8743 1.1489 -131.4069
7 3 2 2.0000 0.0990 1.5911 1606.4949 2.0000 0.2093 0.8658 413.5830
8 4 2 2.0000 -0.8689 0.5602 -64.4726 2.0000 0.9369 1.7423 185.9592
9 1 3 2.0000 -0.8773 0.2694 -30.7050 2.0000 1.0515 0.2212 21.0366
10 2 3 2.0000 -0.1258 2.6033 -2069.8231 2.0000 0.5229 1.0336 197.6485
11 3 3 2.0000 0.5014 1.4952 298.1875 2.0000 0.2659 0.8088 304.1429
12 4 3 2.0000 -0.1845 0.7698 -417.1649 2.0000 0.1110 0.8169 736.0116
「代码」
dat %>% group_by(F4,F3) %>% summarise_at(c("y1","y2"),list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
「结果」
> dat %>% group_by(F4,F3) %>% summarise_at(c("y1","y2"),list(n = ~length(.), mean =~ mean(.), sd = ~sd(.), cv = ~sd(.)/mean(.)*100),na.rm=T)
# A tibble: 12 x 10
# Groups: F4 [4]
F4 F3 y1_n y2_n y1_mean y2_mean y1_sd y2_sd y1_cv y2_cv
<int> <int> <int> <int> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
1 1 1 2 2 -0.0799 -0.0356 0.680 0.834 -851. -2344.
2 1 2 2 2 0.314 -0.916 0.261 0.314 83.1 -34.2
3 1 3 2 2 -0.877 1.05 0.269 0.221 -30.7 21.0
4 2 1 2 2 -0.332 -0.122 0.161 1.42 -48.5 -1155.
5 2 2 2 2 -0.0597 -0.874 0.241 1.15 -403. -131.
6 2 3 2 2 -0.126 0.523 2.60 1.03 -2070. 198.
7 3 1 2 2 0.581 -0.419 0.170 1.20 29.3 -285.
8 3 2 2 2 0.0990 0.209 1.59 0.866 1606. 414.
9 3 3 2 2 0.501 0.266 1.50 0.809 298. 304.
10 4 1 2 2 0.929 -0.114 1.21 0.377 131. -332.
11 4 2 2 2 -0.869 0.937 0.560 1.74 -64.5 186.
12 4 3 2 2 -0.185 0.111 0.770 0.817 -417. 736.
「数据预览：」
> library(learnasreml)
> data(MET)
> str(MET)
'data.frame':400 obs. of 5 variables:
$ Year : Factor w/ 2 levels "2009","2010": 1 1 1 1 1 1 1 1 1 1 ...
$ Location: Factor w/ 5 levels "CI","FL","KN",..: 3 3 3 3 3 3 3 3 3 3 ...
$ Rep : Factor w/ 4 levels "1","2","3","4": 1 1 1 1 1 1 1 1 1 1 ...
$ Cul : Factor w/ 10 levels "CalhounGray",..: 3 1 9 2 5 4 7 10 6 8 ...
$ Yield : num 56.2 74.2 32.6 74.2 64.8 ...
「分析要求：」
> MET %>% group_by(Location) %>% summarise_at("Yield",list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T), cv = ~std/avg*100))
# A tibble: 5 x 4
Location avg std cv
* <fct> <dbl> <dbl> <dbl>
1 CI 61.8 19.5 31.5
2 FL 101. 27.7 27.3
3 KN 63.8 17.5 27.4
4 SC 82.7 27.2 32.9
5 TX 27.5 22.4 81.5
> MET %>% group_by(Location,Year) %>% summarise_at("Yield",list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T), cv = ~std/avg*100))
# A tibble: 10 x 5
# Groups: Location [5]
Location Year avg std cv
<fct> <fct> <dbl> <dbl> <dbl>
1 CI 2009 54.0 20.7 38.3
2 CI 2010 69.4 14.8 21.4
3 FL 2009 99.0 23.5 23.8
4 FL 2010 104. 31.5 30.4
5 KN 2009 66.0 20.5 31.0
6 KN 2010 61.6 13.7 22.3
7 SC 2009 82.9 26.6 32.1
8 SC 2010 82.5 28.2 34.1
9 TX 2009 40.3 25.2 62.5
10 TX 2010 15.1 8.10 53.8
> MET %>% group_by(Location,Cul) %>% summarise_at("Yield",list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T), cv = ~std/avg*100))
# A tibble: 50 x 5
# Groups: Location [5]
Location Cul avg std cv
<fct> <fct> <dbl> <dbl> <dbl>
1 CI CalhounGray 73.0 23.3 31.9
2 CI CrimsonSweet 56.5 25.3 44.8
3 CI EarlyCanada 53.1 11.7 22.0
4 CI FiestaF1 75.3 16.4 21.8
5 CI GeorgiaRattlesnake 62.8 12.3 19.6
6 CI Legacy 59.4 17.6 29.6
7 CI Mickylee 54.2 15.9 29.4
8 CI Quetzali 51.8 16.1 31.1
9 CI StarbriteF1 81.2 17.4 21.5
10 CI SugarBaby 50.1 14.4 28.8
# ... with 40 more rows
「数据：」
> data(fm)
> str(fm)
'data.frame':827 obs. of 13 variables:
$ TreeID : Factor w/ 827 levels "80001","80002",..: 1 2 3 4 5 6 7 8 9 10 ...
$ Spacing: Factor w/ 2 levels "2","3": 2 2 2 2 2 2 2 2 2 2 ...
$ Rep : Factor w/ 5 levels "1","2","3","4",..: 1 1 1 1 1 1 1 1 1 1 ...
$ Fam : Factor w/ 55 levels "70001","70002",..: 44 44 44 15 15 2 2 10 10 10 ...
$ Plot : Factor w/ 4 levels "1","2","3","4": 1 2 4 1 4 2 4 1 2 3 ...
$ dj : num 0.334 0.348 0.354 0.335 0.322 0.359 0.368 0.358 0.323 0.298 ...
$ dm : num 0.405 0.393 0.429 0.408 0.372 0.45 0.509 0.381 0.393 0.361 ...
$ wd : num 0.358 0.365 0.379 0.363 0.332 0.392 0.388 0.369 0.347 0.324 ...
$ h1 : int 29 24 19 46 33 30 37 32 34 28 ...
$ h2 : int 130 107 82 168 135 132 124 126 153 127 ...
$ h3 : int 239 242 180 301 271 258 238 290 251 243 ...
$ h4 : int 420 410 300 510 470 390 380 460 430 410 ...
$ h5 : int 630 600 500 700 670 570 530 660 600 630 ...
可以看到，性状有dj, dm, wd, h1 h2 h3 h4 h5
可以用summarise_if批量处理：
> fm %>% summarise_if(is.numeric,list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T)))
dj_avg dm_avg wd_avg h1_avg h2_avg h3_avg h4_avg h5_avg dj_std dm_std wd_std h1_std h2_std h3_std h4_std h5_std
1 0.3572712 0.4550073 0.3814172 37.04474 138.5054 254.6977 431.1893 619.7573 0.02440212 0.04504642 0.02743006 8.425672 29.54003 45.16661 81.61072 94.87955
可以用pivot_longer将格式变得友好：
> fm %>% summarise_if(is.numeric,list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T))) %>%
+ pivot_longer(everything(),names_sep = "_",names_to = c("trait",".value"))
# A tibble: 8 x 3
trait avg std
<chr> <dbl> <dbl>
1 dj 0.357 0.0244
2 dm 0.455 0.0450
3 wd 0.381 0.0274
4 h1 37.0 8.43
5 h2 139. 29.5
6 h3 255. 45.2
7 h4 431. 81.6
8 h5 620. 94.9
也可以将数据先变为长数据，然后用group和summarise进行汇总统计：
> fm %>% pivot_longer(6:13) %>% group_by(name) %>% summarise_if(is.numeric,list(avg = ~mean(.,na.rm=T), std = ~sd(.,na.rm=T),cv =~ std/avg))
# A tibble: 8 x 4
name avg std cv
* <chr> <dbl> <dbl> <dbl>
1 dj 0.357 0.0244 0.0683
2 dm 0.455 0.0450 0.0990
3 h1 37.0 8.43 0.227
4 h2 139. 29.5 0.213
5 h3 255. 45.2 0.177
6 h4 431. 81.6 0.189
7 h5 620. 94.9 0.153
8 wd 0.381 0.0274 0.0719
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