我有一个数据框架与2个关键变量，我想创建一个基于现有的第三个，我的数据:
62In base R:
set.seed(100)
dat$general_capitale = 0
dat$general_capitale[dat$Qi==1] = sample(0:6, length(dat$general_capitale[dat$Qi==1]), replace = TRUE)
dat$general_capitale[dat$Qi==2] = sample(6:12, length(dat$general_capitale[dat$Qi==2]), replace = TRUE)
dat$general_capitale[dat$Qi==3] = sample(c(14,15,17,20), length(dat$general_capitale[dat$Qi==2]), replace = TRUE)
dat
# Qi age general_capitale
# 1 1 56 2
# 2 5 62 0
# 3 4 24 0
# 4 2 46 12
我用"随机数"来假设。你指的是均匀分布范围内的随机整数。
df$general_capitale <- ( 0L +
(df$Qi == 1) * sample(0:6, nrow(df), replace = TRUE) +
(df$Qi == 2) * sample(6:12, nrow(df), replace = TRUE) +
(df$Qi == 3) * sample(c(14L, 15L, 17L, 20L), nrow(df), replace = TRUE)
)