如何转换df';从for循环到purrr和dplyr的s变量赋值?
代码来自 但我想充分利用FP如何转换df';从for循环到purrr和dplyr的s变量赋值?,r,functional-programming,tidyverse,purrr,R,Functional Programming,Tidyverse,Purrr,代码来自 但我想充分利用FP 这对我来说很难,因为组合变量赋值和purrr是一个可能的建议,但它只是同一油漆的不同颜色 result <- mtcars walk(1:length(trans), function(i) result <<- result %>% mutate_at(names(trans)[[i]],trans[[i]])) result result这里有一个purrr/dplyr选项,使用imap\u-dfc library(tidyvers
这对我来说很难,因为组合变量赋值和purrr是一个可能的建议,但它只是同一油漆的不同颜色
result <- mtcars
walk(1:length(trans),
function(i) result <<- result %>% mutate_at(names(trans)[[i]],trans[[i]]))
result
result这里有一个purrr
/dplyr
选项,使用imap\u-dfc
library(tidyverse)
imap_dfc(trans, ~mtcars %>% transmute_at(vars(.y), funs(.x))) %>%
bind_cols(mtcars %>% select(-one_of(names(trans)))) %>%
select(names(mtcars))
# mpg cyl disp hp drat wt qsec vs am gear carb
#1 21.0 6 2.621936 110 3.90 2.620 16.46 0 manual 4 4
#2 21.0 6 2.621936 110 3.90 2.875 17.02 0 manual 4 4
#3 22.8 4 1.769807 93 3.85 2.320 18.61 1 manual 4 1
#4 21.4 6 4.227872 110 3.08 3.215 19.44 1 auto 3 1
#5 18.7 8 5.899356 175 3.15 3.440 17.02 0 auto 3 2
#6 18.1 6 3.687098 105 2.76 3.460 20.22 1 auto 3 1
#7 14.3 8 5.899356 245 3.21 3.570 15.84 0 auto 3 4
#8 24.4 4 2.403988 62 3.69 3.190 20.00 1 auto 4 2
#9 22.8 4 2.307304 95 3.92 3.150 22.90 1 auto 4 2
#10 19.2 6 2.746478 123 3.92 3.440 18.30 1 auto 4 4
#11 17.8 6 2.746478 123 3.92 3.440 18.90 1 auto 4 4
#12 16.4 8 4.519562 180 3.07 4.070 17.40 0 auto 3 3
#13 17.3 8 4.519562 180 3.07 3.730 17.60 0 auto 3 3
#14 15.2 8 4.519562 180 3.07 3.780 18.00 0 auto 3 3
#15 10.4 8 7.734711 205 2.93 5.250 17.98 0 auto 3 4
#16 10.4 8 7.538066 215 3.00 5.424 17.82 0 auto 3 4
#17 14.7 8 7.210324 230 3.23 5.345 17.42 0 auto 3 4
#18 32.4 4 1.289665 66 4.08 2.200 19.47 1 manual 4 1
#19 30.4 4 1.240503 52 4.93 1.615 18.52 1 manual 4 2
#20 33.9 4 1.165123 65 4.22 1.835 19.90 1 manual 4 1
#21 21.5 4 1.968091 97 3.70 2.465 20.01 1 auto 3 1
#22 15.5 8 5.211098 150 2.76 3.520 16.87 0 auto 3 2
#23 15.2 8 4.981678 150 3.15 3.435 17.30 0 auto 3 2
#24 13.3 8 5.735485 245 3.73 3.840 15.41 0 auto 3 4
#25 19.2 8 6.554840 175 3.08 3.845 17.05 0 auto 3 2
#26 27.3 4 1.294581 66 4.08 1.935 18.90 1 manual 4 1
#27 26.0 4 1.971368 91 4.43 2.140 16.70 0 manual 5 2
#28 30.4 4 1.558413 113 3.77 1.513 16.90 1 manual 5 2
#29 15.8 8 5.751872 264 4.22 3.170 14.50 0 manual 5 4
#30 19.7 6 2.376130 175 3.62 2.770 15.50 0 manual 5 6
#31 15.0 8 4.932517 335 3.54 3.570 14.60 0 manual 5 8
#32 21.4 4 1.982839 109 4.11 2.780 18.60 1 manual 4 2
说明:imap\u dfc(…)
column绑定两个修改过的列,然后将这两个列绑定到mtcars
,而不包含修改过的两个列;最后一行重新排列列,使其对应于原始的mtcars
列顺序
result <- mtcars
walk(1:length(trans),
function(i) result <<- result %>% mutate_at(names(trans)[[i]],trans[[i]]))
result
result <- mtcars
pmap(list(names(trans),trans),
function(n,f) result <<- result %>% mutate_at(n,f))
result
result <- mtcars
iwalk(trans,
function(f,n) result <<- result %>% mutate_at(n,f))
result
library(tidyverse)
imap_dfc(trans, ~mtcars %>% transmute_at(vars(.y), funs(.x))) %>%
bind_cols(mtcars %>% select(-one_of(names(trans)))) %>%
select(names(mtcars))
# mpg cyl disp hp drat wt qsec vs am gear carb
#1 21.0 6 2.621936 110 3.90 2.620 16.46 0 manual 4 4
#2 21.0 6 2.621936 110 3.90 2.875 17.02 0 manual 4 4
#3 22.8 4 1.769807 93 3.85 2.320 18.61 1 manual 4 1
#4 21.4 6 4.227872 110 3.08 3.215 19.44 1 auto 3 1
#5 18.7 8 5.899356 175 3.15 3.440 17.02 0 auto 3 2
#6 18.1 6 3.687098 105 2.76 3.460 20.22 1 auto 3 1
#7 14.3 8 5.899356 245 3.21 3.570 15.84 0 auto 3 4
#8 24.4 4 2.403988 62 3.69 3.190 20.00 1 auto 4 2
#9 22.8 4 2.307304 95 3.92 3.150 22.90 1 auto 4 2
#10 19.2 6 2.746478 123 3.92 3.440 18.30 1 auto 4 4
#11 17.8 6 2.746478 123 3.92 3.440 18.90 1 auto 4 4
#12 16.4 8 4.519562 180 3.07 4.070 17.40 0 auto 3 3
#13 17.3 8 4.519562 180 3.07 3.730 17.60 0 auto 3 3
#14 15.2 8 4.519562 180 3.07 3.780 18.00 0 auto 3 3
#15 10.4 8 7.734711 205 2.93 5.250 17.98 0 auto 3 4
#16 10.4 8 7.538066 215 3.00 5.424 17.82 0 auto 3 4
#17 14.7 8 7.210324 230 3.23 5.345 17.42 0 auto 3 4
#18 32.4 4 1.289665 66 4.08 2.200 19.47 1 manual 4 1
#19 30.4 4 1.240503 52 4.93 1.615 18.52 1 manual 4 2
#20 33.9 4 1.165123 65 4.22 1.835 19.90 1 manual 4 1
#21 21.5 4 1.968091 97 3.70 2.465 20.01 1 auto 3 1
#22 15.5 8 5.211098 150 2.76 3.520 16.87 0 auto 3 2
#23 15.2 8 4.981678 150 3.15 3.435 17.30 0 auto 3 2
#24 13.3 8 5.735485 245 3.73 3.840 15.41 0 auto 3 4
#25 19.2 8 6.554840 175 3.08 3.845 17.05 0 auto 3 2
#26 27.3 4 1.294581 66 4.08 1.935 18.90 1 manual 4 1
#27 26.0 4 1.971368 91 4.43 2.140 16.70 0 manual 5 2
#28 30.4 4 1.558413 113 3.77 1.513 16.90 1 manual 5 2
#29 15.8 8 5.751872 264 4.22 3.170 14.50 0 manual 5 4
#30 19.7 6 2.376130 175 3.62 2.770 15.50 0 manual 5 6
#31 15.0 8 4.932517 335 3.54 3.570 14.60 0 manual 5 8
#32 21.4 4 1.982839 109 4.11 2.780 18.60 1 manual 4 2