我想知道在R中是否有任何等效的。loc,我可以在for循环中有多个条件。
在python中,我使用.loc完成了这个任务,如下面的代码所示。然而,我无法在r中复制此for column in df.columns[1:9]:
for i in range(4,len(df)):
col = 'AC' + str(column[-1])
df[col][i] = df['yw_lagged'].loc[(df['id'] == df[column][i]) & (df['yearweek'] == df['yearweek'][i])]
在R中,我认为这是可行的
df[i,col] <- df[df$id == df[column][i] & df$yearweek == df$yearweek[i], "yw_lagged"]
但是它似乎不像。loc那样过滤。
编辑:
structure(list(id = c(1, 2, 6, 7, 1, 2), v1 = c(2, 1, 1, 1, 2,
1), v2 = c(6, 3, 2, 2, 6, 3), v3 = c(7, 6, 5, 3, 7, 6), v4 =
c(NA, 7, 7, 6, NA, 7), v5 = c(NA, 8, 14, 8, NA, 8), v6 = c(NA,
NA,15, 15, NA, NA), v7 = c(NA, NA, 16, 16, NA, NA), v8 = c(NA,
NA,NA, 17, NA, NA), violent = c(1, 0, 1, 0, 0, 0), yw_lagged =
c(NA, NA, NA, NA, 1, 0), yearweek = c(20161, 20161, 20161, 20161,
20162, 20162), AC1 = c(NA, NA, NA, NA, NA, NA), AC2 = c(NA, NA,
NA, NA, NA, NA), AC3 = c(NA, NA, NA, NA, NA, NA), AC4 = c(NA, NA,
NA, NA, NA, NA), AC5 = c(NA, NA, NA, NA, NA, NA), AC6 = c(NA,
NA, NA, NA, NA, NA), AC7 = c(NA, NA, NA, NA, NA, NA), AC8 = c(NA,
NA, NA, NA, NA, NA)), row.names = c(NA, -6L), class = c("tbl_df",
"tbl", "data.frame"))
期望输出的图片(尝试使用颜色添加一些连接)
示例数据缺少任何匹配,因此我将覆盖yw_lagged
的几行:
df$yw_lagged[1:4] <- 1:4
从这里
dplyr
library(dplyr)
df %>%
group_by(yearweek) %>%
mutate(across(matches("^v[0-9]+"),
~ yw_lagged[match(., id)],
.names = "AC{sub('^v', '', .col)}")) %>%
ungroup()
# # A tibble: 6 × 20
# id v1 v2 v3 v4 v5 v6 v7 v8 violent yw_lagged yearweek AC1 AC2 AC3 AC4 AC5 AC6 AC7 AC8
# <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
# 1 1 2 6 7 NA NA NA NA NA 1 1 20161 2 3 4 NA NA NA NA NA
# 2 2 1 3 6 7 8 NA NA NA 0 2 20161 1 NA 3 4 NA NA NA NA
# 3 6 1 2 5 7 14 15 16 NA 1 3 20161 1 2 NA 4 NA NA NA NA
# 4 7 1 2 3 6 8 15 16 17 0 4 20161 1 2 NA 3 NA NA NA NA
# 5 1 2 6 7 NA NA NA NA NA 0 1 20162 0 NA NA NA NA NA NA NA
# 6 2 1 3 6 7 8 NA NA NA 0 0 20162 1 NA NA NA NA NA NA NA
data.table
library(data.table)
cols <- grep("v[0-9]+", names(df), value = TRUE)
data.table(df)[, (sub("^v", "AC", cols)) :=
lapply(.SD, (z) yw_lagged[match(z, id)]),
.SDcols = cols][]
# id v1 v2 v3 v4 v5 v6 v7 v8 violent yw_lagged yearweek AC1 AC2 AC3 AC4 AC5 AC6 AC7 AC8
# <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num> <num>
# 1: 1 2 6 7 NA NA NA NA NA 1 1 20161 2 3 4 NA NA NA NA NA
# 2: 2 1 3 6 7 8 NA NA NA 0 2 20161 1 NA 3 4 NA NA NA NA
# 3: 6 1 2 5 7 14 15 16 NA 1 3 20161 1 2 NA 4 NA NA NA NA
# 4: 7 1 2 3 6 8 15 16 17 0 4 20161 1 2 NA 3 NA NA NA NA
# 5: 1 2 6 7 NA NA NA NA NA 0 1 20162 2 3 4 NA NA NA NA NA
# 6: 2 1 3 6 7 8 NA NA NA 0 0 20162 1 NA 3 4 NA NA NA NA