我想要做的是为比例的上下置信区间设置列。
这是我所做的:
> #Create some sample data
> Frustration <- data.table(group = c('A','B','C'), trials = c(363,1398,139), surg = c(57,276,18))
> Frustration
group trials surg
1: A 363 57
2: B 1398 276
3: C 139 18
>
> #try to get confidence levels. what I am expecting is CI to be a list of 2 elements, for each value of group, but I don't think that is working
> F2 <- Frustration[, .(CI = prop.test(surg, trials, conf.level = .75)['conf.int']), by = .(group)]
> F2
group CI
1: A 0.1350140,0.1816828
2: B 0.1851178,0.2103210
3: C 0.09701967,0.16972056
>
> #lower is still a list here - I am stumped
> F3 <- F2[, .(lower = CI[[1]]), by = .(group)]
> F3
group lower
1: A 0.1350140,0.1816828
2: B 0.1851178,0.2103210
3: C 0.09701967,0.16972056
我认为混淆与列表以及数据表如何处理返回有关。谢谢你的帮助,
大卫
最佳答案
CI
是 list
柱子。我们可以使用 transpose
并分配( :=
)
library(data.table)
F2[, c('lower', 'upper') := data.table::transpose(CI)][, CI := NULL][]
#Key: <group>
# group lower upper
# <char> <num> <num>
#1: A 0.13501400 0.1816828
#2: B 0.18511780 0.2103210
#3: C 0.09701967 0.1697206
关于r - 提取置信区间 data.table,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63459013/